Si la réalité physique fondamentale s'avère granulaire et discontinue, qu'est-ce qui permet à notre conscience de maintenir un sentiment ininterrompu d'identité et de présence à travers le temps ?

Buddhism kshanikavada momentary consciousness santana continuity personal identity

### The Buddhist Position and Lived Practice In classical Indian Buddhist thought, personal identity is fundamentally non-substantial (*anattā* / *anātman*), replacing an enduring essence with dynamic process. Scholastic Buddhism formalized this into **kṣaṇikavāda** (the doctrine of momentariness), which posits that conditioned phenomena—both physical matter and conscious states—exist only for an indivisible temporal instant (*kṣaṇa*), perishing immediately upon arising. In lived contemplative practice (such as *vipassanā*), meditators train attention to perceive these atomic increments directly. By introspectively deconstructing the intuitive sense of a unified, enduring observer into an evanescent flicker of cognitions, practitioners dissolve attachment (*upādāna*) to the "I," which canonical Buddhism diagnoses as the root of existential suffering (*dukkha*). ### Continuity Without Identity: *Saṃtāna* To explain memory, moral agency, and karmic retribution without an enduring self, the tradition introduced the concept of **saṃtāna** (the psycho-physical stream or continuum). In human terms: - The person is not an unchanging pearl strung on a timeline, but a stream of discrete, causally interconnected moments. - Much like a flame passed between candles or individual frames creating the illusion of a moving film, each momentary state perishes while immediately conditioning the arising of the next (*pratītyasamutpāda*). ### Key Figures, Texts, and Tensions - **Vasubandhu** (c. 4th–5th century CE), in the *Abhidharmakośabhāṣya* (especially Chapter IX, *Pudgalapratiṣedha*, or "Refutation of the Self"), argued that personal identity is purely a conventional designation (*prajñaptisat*) superimposed over the five aggregates (*skandhas*). Vasubandhu famously declared: *"Action exists, and also its consequence, but an agent is not found. There is no entity that discards these aggregates and adopts others, apart from the convention of the aggregates."* - **Dharmakīrti** (c. 6th–7th century CE) defended *kṣaṇikavāda* in his *Pramāṇavārttika* by defining real existence (*vastu*) as causal efficacy (*arthakriyākāritva*): a permanent, unchanging entity cannot act sequentially in time, meaning anything real must be momentary. - **Internal Tensions:** Classical traditions diverged over how this continuity functions. While the early Sarvāstivāda school controversially posited that the underlying nature of dharmas persists across past, present, and future, the Sautrāntika countered with present-only momentariness, introducing karmic "seeds" (*bīja*) planted in the mind-stream. This prompted the Yogācāra school to formulate the "storehouse consciousness" (*ālaya-vijñāna*) to bridge lapses during unconscious states. Conversely, the heterodox *Pudgalavāda* school asserted an ineffable "person" (*pudgala*) to anchor identity, an idea mainstream schools vigorously rejected as crypto-substantialism. ### Epistemic Boundary While modern cognitive science (such as Francisco Varela’s neurophenomenology) engages the Buddhist process-view of cognition to model a decentralized, emergent ego, claims asserting that the *saṃtāna* preserves karmic imprints across biological death remain doctrinal metaphysics rather than empirical consensus.

• stanford.edu
• reddit.com
• dharmawisdom.org
• sinapticas.com
• dokumen.pub
• scribd.com

1 source from the original research is no longer reachable

Christian anthropology soul bodily resurrection persistence personal identity through time Aquinas

### Core Position and Lived Tradition Christian anthropology rejects both materialist annihilation and Platonist flight from the flesh, affirming instead the psychosomatic unity of the human being and the ultimate promise of bodily resurrection (1 Corinthians 15). In lived religious practice, this conviction underpins sacramental theology, liturgical care for the dying, and traditional burial rites, treating the physical body not as a temporary shell or prison, but as intrinsic to redeemed personhood. ### Aquinas’s Hylomorphism and Personal Identity Integrating Aristotelian metaphysics with Catholic dogma, Thomas Aquinas argues that the human being is a unified composite of matter and form (*Summa Theologiae* [ST] I, qq. 75–76). In this **hylomorphic framework**, the rational soul (*anima*) is not an independent person, but the **substantial form** of the physical body—its animating and unifying principle. Because personhood requires this composite, Aquinas famously remarks: > *“Anima mea non est ego”* (“My soul is not I”) (*Commentary on 1 Corinthians*, c. 15, lec. 2). Aquinas maintains that the rational soul is subsistent and incorruptible, surviving biological death in an intermediate state (*anima separata*) due to its immaterial intellectual operations. However, he regards the separated soul as being in an unnatural, incomplete state. True personal fulfillment and complete numerical persistence across time require the eschatological reunion of the identical soul with its reconstituted matter at the general resurrection (*ST* Supplement, q. 79, a. 1–2). ### Key Concepts and Internal Debates - **Key Terms**: *Hylomorphism* (matter-form composition), *substantial form* (the principle giving matter human life and identity), and *anima separata* (the surviving post-mortem soul). - **Internal Tensions**: Contemporary scholars of Aquinas diverge on persistence between death and resurrection. **Corruptionists** (e.g., Patrick Toner) argue that the person ceases to exist during the intermediate state and resumes only at the resurrection. Conversely, **survivalists** (e.g., Eleonore Stump) argue that the persisting soul carries personal identity through time, albeit in an impaired mode. Broadly, Christian thinkers remain divided between Thomistic hylomorphism, Cartesian substance dualism, and emergent Christian physicalism. - **Epistemic Distinction**: From the perspective of modern science, empirical consensus views conscious mental states as bound to functioning neural substrates; immaterial souls and physical resurrection are theological and metaphysical doctrines, not empirical scientific models.

• anselm.edu
• newadvent.org
• schoolofmary.org
• stanford.edu
• biola.edu
• digitaloceanspaces.com
• mdpi.com
• ccel.org
• weebly.com

Ash'arite atomism continuous recreation tajdid al-khalq Nafs self continuity identity

### Metaphysics of Identity: Ashʿarite Atomism and *Tajdīd al-Khalq* In classical Sunni philosophical theology (*kalām*), the Ashʿarite school formulated a radical occasionalist ontology to safeguard absolute divine omnipotence. Grounded in the works of Abū al-Ḥasan al-Ashʿarī (d. 936) and systematized by al-Bāqillānī (d. 1013), the created cosmos consists solely of discrete, indivisible substances (*jawāhir*) and transient accidents (*aʿrāḍ*). The school’s foundational maxim holds that *“no accident endures for two moments of time”* (*al-ʿaraḍ lā yabqā zamānayn*). Qualities such as motion, color, cognition, and life (*ḥayāt*) vanish at the instant of their emergence. The cosmos does not possess innate causal efficacy; instead, God preserves reality through continuous recreation (*tajdīd al-khalq*) at every indivisible temporal instant. This framework poses a fundamental puzzle for diachronic personal identity and moral accountability: if a human being is a composite of atoms whose life and consciousness dissolve every moment, what secures the continuity of the self (*nafs*) across time and into the eschatological resurrection (*maʿād*)? * **Early Kalām:** Early Ashʿarites rejected the existence of an enduring, immaterial Cartesian or Platonic soul. They defined the *nafs* as either a subtle physical body (*jism laṭīf*) or an accidental property of life inhering in atomic matter. Personal continuity across time is not rooted in an internal metaphysical core, but in divine habit (*ʿāda*): God faithfully recreates the atoms (*aʿyān al-jawāhir*) alongside new accidents that preserve memory, moral continuity, and individual acquisition of responsibility (*kasb*). * **Internal Tensions and Evolution:** In *Tahāfut al-Falāsifa* (17th Discussion), Abū Ḥāmid al-Ghazālī (d. 1111) reaffirmed strict occasionalism: *“The connection between what is habitually believed to be a cause and what is habitually believed to be an effect is not necessary... Their connection is due to the prior decree of God, who creates them side by side”*. However, under the influence of Avicennian (*falsafa*) psychology, later works by al-Ghazālī and Fakhr al-Dīn al-Rāzī (d. 1209) introduced an enduring, incorporeal spirit (*jawhar rūḥānī*) to stabilize moral agency. Subsequently, Sufi metaphysics (notably Ibn ʿArabī in *Fuṣūṣ al-Ḥikam*) internalized *tajdīd al-khalq* as the cosmic “renewal of creation with each breath” (*bi-l-anfās*), framing moment-to-moment identity as a succession of fresh divine theophanies (*tajalliyāt*). For traditional practitioners, this continuous recreation is lived not as Humean skepticism, but as an experiential awareness of radical dependency (*faqr*) upon *al-Qayyūm* (the Self-Subsisting Sustainer): every breath and instance of consciousness is received anew as an unmerited gift of divine grace.

• github.com
• wikipedia.org
• ghayb.com
• ghayb.com
• nasirlawsite.com
• ghayb.com
• thequran.love
• ghazali.org
• researchgate.net
• dokumen.pub
• stanford.edu
• researchgate.net
• gnosijournal.com
• islamic-study.org
• sacredfootsteps.com
• traditionalhikma.com
• almirajsuficentre.org.au

Derek Parfit psychological continuity bundle theory of mind persistence over time discrete physical states

### Analytic Reductionism and Personal Identity Within naturalistic analytic philosophy, Derek Parfit’s landmark treatise *Reasons and Persons* (1984, Part Three) transformed the metaphysics of persistence over time. Modernizing David Hume’s "bundle theory"—which rejects an enduring Cartesian soul or indivisible ego in favor of a causally linked bundle of perceptions and discrete physical states—Parfit defended **Reductionism**. On this view, personal identity is not an indivisible "further fact"; rather, a person's existence consists entirely in physical events, neurobiological processes, and interconnected mental episodes. ### Core Concepts: Relation R and Survival Parfit articulates psychological persistence through **Relation R**: psychological connectedness (direct links such as recalling a specific memory or fulfilling a prior intention) and psychological continuity (overlapping chains of strong connectedness). While classic psychological accounts trace back to John Locke, Parfit introduced radical thought experiments—such as split-brain fission and teletransportation—to demonstrate that Relation R can branch and admits of degrees, whereas numerical identity must logically be strictly one-to-one and all-or-nothing. From this, he derives his most celebrated thesis: **personal identity is not what matters in survival**; what matters is Relation R. ### Internal Tensions and Existential Practice Within naturalism, Parfit’s psychological criterion is actively contested by **animalism** (e.g., Eric T. Olson), a somatic view holding that human persons are fundamentally biological organisms persisting through brute bodily and metabolic continuity rather than mental continuity. For practitioners of reductionism, dissolving the rigid boundary of the self carries profound existential and ethical consequences. Parfit observed that abandoning belief in an enduring Cartesian self liberates the agent from egoism and the dread of death: > *"My life seemed like a glass tunnel, through which I was moving faster every year, and at the end of which there was darkness... When I changed my view, the walls of my glass tunnel disappeared. I now live in the open air"* (*Reasons and Persons*, 1984, p. 281). ### Epistemic Standing Parfitian reductionism represents a mainstream, widely debated metaphysical position in secular analytic philosophy that aligns directly with contemporary cognitive science and physicalism. It is epistemically distinct from metaphysical dualism, substance theories of the soul, or fringe panpsychist models, operating strictly on the premise that mind supervenes upon discrete physical and neural states.

• wikipedia.org
• philosophy.org.za
• stanford.edu
• peterxichen.com
• unifr.ch
• mbrenndoerfer.com
• davidjinkins.com
• ijset.in
• stanford.edu

neuroscience temporal binding window perceptual continuity discrete frames neural oscillations gamma

### Scientific Consensus and Central Premise In mainstream cognitive neuroscience and psychophysics, the subjective experience of a seamless, uninterrupted reality is recognized as a neurocomputational construction. Rather than reflecting an unmediated stream, perceptual continuity is synthesized by neural networks that sample, filter, and bind sensory inputs across finite temporal buffers. ### Core Mechanisms and Key Concepts 1. **The Temporal Binding Window (TBW):** Sensory signals travel at different physical and neural conduction velocities (e.g., light vs. sound). To form coherent percepts, the brain employs a TBW—a tolerance interval (typically spanning ~50–250 ms) within which multi-feature or cross-modal stimuli are integrated as a single unified event rather than segregated as distinct inputs. Seminal work by Mark Wallace and colleagues demonstrates that this window is computationally dynamic and malleable through perceptual learning. 2. **Perceptual Cycles and Discrete Framing:** A prominent line of research championed by Rufin VanRullen and Christof Koch posits that sensory processing is periodically sampled in discrete "snapshots". Ongoing low-frequency oscillations (predominantly theta, 4–7 Hz, and alpha, 8–12 Hz) modulate cortical excitability, such that stimuli arriving at the "peak" phase are consciously registered, while those at the trough are deferred or suppressed. 3. **Gamma Synchrony and Binding:** Addressing how disparate features (e.g., color, motion, shape) processed in distinct cortical regions are unified, Wolf Singer and Andreas K. Engel formulated the "temporal binding hypothesis". They showed that transient, millisecond-precision phase synchronization in the gamma band (>30–80 Hz) functionally couples distributed neural ensembles into a coherent representational state. ### Clinical Psychology and Psychiatry Clinical research reveals that temporal binding mechanisms are systematically altered in neurodevelopmental and psychiatric conditions. Patients with schizophrenia and autism spectrum disorder frequently display abnormally widened TBWs. This temporal imprecision impairs multisensory fusion (e.g., matching visual lip movement to speech sounds) and correlates with sensory fragmentation and hallucinations, though targeted behavioral training can partially restore window acuity. ### Epistemic Status and Internal Tensions Empirical consensus affirms that oscillatory phase modulates neural excitability and that temporal binding windows constrain conscious perception. However, sharp internal tensions persist: - **Discrete vs. Continuous Processing:** Whether phenomenal awareness is fundamentally parsed into discrete frame-like cycles (VanRullen) or arises as an asynchronous, continuously updating dynamic manifold remains unsettled. - **Causality vs. Epiphenomena:** While noninvasive neuromodulation (e.g., tACS) provides evidence that manipulating rhythms alters binding thresholds, a sizable camp argues that high-frequency oscillations like gamma are computational "exhaust fumes"—correlates of local recurrent excitation rather than the causal substrate of consciousness. Speculative metaphysical extensions (e.g., quantum Orch-OR or panpsychist IIT frameworks) remain strictly outside this empirical consensus.

• researchgate.net
• nih.gov
• helfrich-lab.com
• nih.gov
• nih.gov
• cnrs.fr
• arvojournals.org
• researchgate.net
• ru.nl
• oxfordreference.com
• researchgate.net
• frontiersin.org
• nih.gov

loop quantum gravity discrete spacetime emergence of classical smooth time observer phenomenology

In mainstream theoretical physics and quantum cosmology, **Loop Quantum Gravity (LQG)** represents a leading non-perturbative, background-independent candidate for reconciling General Relativity with quantum mechanics. Originating from the reformulation of general relativity via Ashtekar variables (Abhay Ashtekar, 1986) and developed by Carlo Rovelli and Lee Smolin, LQG radically posits that spacetime is not a smooth, pre-existing container, but a quantum entity itself. ### Distinctive Concepts and Mechanisms * **Spin Networks and Discrete Spacetime:** Spatial geometry is quantized into discrete "chunks" at the Planck scale ($\sim 10^{-35}\text{ m}$). Represented as graphs called **spin networks**, their nodes carry discrete eigenvalues of volume, and their intersecting edges carry quantized units of area. * **Spinfoams:** The transition between spin networks forms a four-dimensional histories framework known as a **spinfoam**, representing the quantum evolution of geometry. * **The Problem of Time:** Because the theory is diffeomorphism-invariant, its fundamental Hamiltonian constraint equation takes the timeless form $\hat{H}\Psi = 0$ (analogous to the Wheeler-DeWitt equation). Fundamental physics contains no absolute background time parameter $t$. * **Emergent & Thermal Time:** As Rovelli and Alain Connes proposed in the *Thermal Time Hypothesis* (1994), smooth classical time is not fundamental; rather, temporal flow is an emergent, thermodynamic phenomenon. As Rovelli summarizes in *Quantum Gravity* (2004), *"The world is not located in space, and does not unfold in time: spacetime is formed by the relational interactions of quantum physical systems."* The perceived "flow" of time and classical smoothness reflect an observer’s coarse-graining and statistical ignorance over underlying microstates. ### Internal Branches and Epistemic Status Practitioners generally divide into two branches: **canonical LQG** (operator quantization on spatial 3-manifolds) and **covariant LQG** (path-integral spinfoam models). **Epistemic Distinction:** While General Relativity and Quantum Mechanics are empirically established pillars of physics, LQG remains a **theoretically rigorous but empirically unverified hypothesis**. Planck-scale energies remain far beyond direct laboratory observation. Furthermore, deriving the classical limit—rigorously demonstrating how a smooth, macroscopic 4D Einsteinian spacetime emerges from discrete spin networks—remains an active, unresolved technical challenge in quantum gravity research.

• stanford.edu
• researchgate.net
• nih.gov
• stanford.edu
• philosopheasy.com
• sciencespectrumu.com
• imperial.ac.uk
• pitt.edu
• arxiv.org
• philosophyoftime.org.uk
• fqxi.org
• nih.gov
• stackexchange.com
• wikipedia.org

discrete quantum collapse Orch-OR orchestrated objective reduction subjective flow of time

### Theoretical Framework: Orch-OR and Discrete Temporal Flow Orchestrated Objective Reduction (Orch-OR), formulated in the 1990s by mathematical physicist Sir Roger Penrose and anesthesiologist Stuart Hameroff, is a speculative, minority model of consciousness. While mainstream neuroscience treats consciousness as an emergent product of classical neural computation and mainstream physics treats quantum measurement as an observer- or environment-induced phenomenon, Orch-OR posits that subjective awareness and the perceived flow of time originate in objective, quantum-gravitational state collapses occurring within the brain. ### Key Figures, Texts, and Concepts Foundational formulations appear in Penrose’s *The Emperor’s New Mind* (1989) and *Shadows of the Mind* (1994), alongside joint reviews in *Physics of Life Reviews* (Hameroff & Penrose, 2014). * **Objective Reduction (OR):** Penrose argues that quantum superpositions (alternative spacetime geometries) are fundamentally unstable. Without needing an external observer, they self-collapse upon reaching a specific quantum-gravity threshold determined by the Diósi–Penrose criterion ($\tau \approx \hbar / E_G$, where $E_G$ is gravitational self-energy). * **Orchestration:** Hameroff proposed that cylindrical lattices of tubulin dimers within neuronal microtubules shield and synchronize coherent quantum states, "orchestrating" the timing and outcome of collapses that modulate synaptic firings. * **Discrete "Now" and the Arrow of Time:** Orch-OR interprets pre-collapse quantum superposition as non-conscious computation. Collapse produces an instantaneous, non-computable conscious event. Hameroff and Penrose explicitly equate these discrete pulses to Alfred North Whitehead’s philosophical "occasions of experience" and Buddhist conceptions of conscious flickers, noting: *"As quantum state reductions are irreversible in time, cascades of Orch OR events present a forward flow of time and 'stream of consciousness'"*. Continuous subjective time is thus viewed as an illusion generated by rapid sequences of discrete spacetime selections. ### Epistemic Status and Tensions Orch-OR sits far outside the scientific consensus. Mainstream biophysicists and neuroscientists maintain that warm, wet, and thermally noisy cellular environments cause environmental decoherence far too quickly (on femtosecond scales) for macroscopic biological quantum coherence to persist (e.g., McKemmish et al., 2009; Tegmark, 2000). Internal tensions exist regarding emphasis: Penrose primarily uses the model to resolve the quantum measurement problem and Gödelian non-computability in mathematical reasoning, while Hameroff extends it toward panpsychism, proto-conscious spacetime geometry, and pharmacology (hypothesizing that anesthetics suppress consciousness by damping microtubule quantum vibrations).

• closertotruth.com
• wikipedia.org
• usp.br
• nih.gov
• arizona.edu
• slideshare.net
• nih.gov
• neuroteoretica.org
• bigbangpage.com
• aqora.io
• nih.gov
• quora.com
• patriziotressoldi.it