Tuesday question.

At precisely what point does chemistry become consciousness?

The human brain operates through electrochemical processes. Plants also use chemical and electrical signals to sense their environment, process information, and respond.

We call one system capable of consciousness and generally assume the other isn't.

But if both operate through physical and chemical processes, what exactly separates complex chemistry from conscious experience?

I'm not claiming plants are conscious. I'm questioning whether we actually understand where consciousness begins — or whether we're defining it by what resembles ourselves.

ABSTRACT: What if déjà vu does not merely deceive us about the past, but momentarily discloses something ordinarily hidden in the structure of time itself? This video begins from the distinctive phenomenology of déjà vu: the uncanny conviction that a singular present has already occurred in precisely this form, despite our simultaneous knowledge that no corresponding event can be located in our biographical past; the impression of foreknowledge that can extend into what has not yet happened; and the accompanying sense of automatism by which one becomes a spectator to one’s own actions.

It considers several historically important attempts to account for these features: from Augustine’s demonological theory of deceptive recollection and Freud’s psychological account of unconscious libidinal forces to Arthur Wigan’s perceptual-doubling hypothesis and contemporary neurological approaches. It then argues that each illuminates some aspect of the phenomenon without fully accounting for the full subjective effect nor its peculiar temporal structure.

The video then develops Henri Bergson’s 1908 account of déjà vu as a “memory of the present.” Against the assumption that memory is formed only after perception has disappeared, Bergson argues that every present divides as it occurs into two contemporaneous tendencies: an actual perception oriented toward action and the future, and a virtual memory that bears from its inception the character of the past. Ordinarily, this memory of the present remains unconscious precisely because it is useless for action: practical consciousness continually outruns it in its movement toward what comes next.

Déjà vu occurs when this forward-directed “attention to life” momentarily weakens and the virtual memory of the present rises alongside perception. The present is consequently experienced through the form of memory and thus as something already lived, even though the apparent past cannot be assigned any prior chronological date. On this account, déjà vu is not simply a defective repetition of an earlier perception but an anomalous encounter with a doubling that, for Bergson, belongs to every moment of temporal experience: the simultaneous differentiation of the present into actual perception and virtual past.

Tuesday question.

At precisely what point does chemistry become consciousness?

The human brain operates through electrochemical processes. Plants also use chemical and electrical signals to sense their environment, process information, and respond.

We call one system capable of consciousness and generally assume the other isn't.

But if both operate through physical and chemical processes, what exactly separates complex chemistry from conscious experience?

I'm not claiming plants are conscious. I'm questioning whether we actually understand where consciousness begins — or whether we're defining it by what resembles ourselves.