Only the living think

1. To think is not merely to process information: it is for something to be at stake. A perception orients, a judgment commits, a mistake costs. Remove all stakes and what remains is states following one another, not thought.
2. But a stake presupposes a being for whom things can go well or badly: a living thing, whose very activity is an effort to keep itself in being, what Spinoza called conatus. Metabolism is not one property among others, it is a standing need, a dependence on the world.
3. A machine, by contrast, risks nothing: unplugged, it loses nothing, for nothing was lacking to it. Its "goals" were assigned from outside and are its own in no sense; it does not maintain itself, it is maintained.
4. Without that risk, the words it handles refer to nothing for it, lacking that directedness toward the world: hunger, pain, loss have a meaning for what can hunger, suffer and lose. There is no point of view where nothing is at stake.

Therefore So thought is not an organization detachable from its bearer: it is the activity of an exposed living being, and the most brilliant machine remains a thing to which nothing happens.

1. The argument makes the need to maintain oneself the condition of thought. But that need describes how thought appeared in us; it does not yet show that it could not appear otherwise.
2. One can in fact say precisely what metabolism brings: a vulnerability, goals of one's own, a dependence on the world that makes things matter. And none of those traits depends on carbon chemistry.
3. Let an artifact be vulnerable, dependent on resources it must seek, exposed to a destruction it avoids on its own account, and it has what the argument demanded. To refuse it still is to admit that the criterion was not concern but material, and one no longer says why material would count.
4. We have known this frontier before: living matter was long held to be animated by a principle of its own that chemistry could not produce, what came to be called vitalism. The frontier receded without any decree having drawn it.

Therefore So the argument does not establish that only the living think: it establishes that thinking takes a being with something to lose, which remains open to beings other than us.