Correspondence between Descartes and Princess Elisabeth

The correspondence between René Descartes and Princess Elisabeth of Bohemia, edited by Jonathan Bennett. One of the main things that Elisabeth famously gives Descartes a hard time about is the problem of mental causation.

http://www.earlymoderntexts.com/pdf/descelis.pdf

The Humans With Super Human Vision

The Humans With Super Human Vision

An unknown number of women may perceive 
millions of colors invisible to the rest of us. One British scientist is trying to track them down and understand their extraordinary power of sight.

Backsliding: Understanding Weakness of Will // Reviews // Notre Dame Philosophical Reviews // University of Notre Dame

Backsliding: Understanding Weakness of Will // Reviews // Notre Dame Philosophical Reviews // University of Notre Dame

Welcome to Life: the singularity, ruined by lawyers

Behaviorism, Philosophical Conceptions of.

Behaviorism, Philosophical Conceptions of. Mandik, P. (in press) In: Kaldis, B. (ed.) Encyclopedia of Philosophy and the Social Sciences. Thousand Oaks, CA: Sage Publications.

Why don't we normally hallucinate?

Why don't we normally hallucinate?

In the brain, the firing of a neuron can either encourage or prevent the firing of its connected neighbors, which means that neurons can act as both activators and inhibitors, making Turing patterns possible. In fact, the researchers suggest that if the visual cortex had a slightly different structure, the Turing mechanism would produce spontaneous neural patterns in it all the time, leading to permanent hallucinations. While this might be fun, it would barely let us see our surroundings. "There would be strong selection pressure against people who think they are seeing weird spiral patterns when in fact what is in front of their face is a hungry tiger!" explains Goldenfeld. Instead, the researchers posit that the topology of the visual cortex does not allow the "inhibitor" signals to travel long distances, which is a requirement for the Turing mechanism. This prevents the Turing mechanism from working properly, giving neurons uniform diffusion patterns rather than geometric Turing patterns. Without the Turing mechanism to create interfering neural excitation patterns, the dominant patterns will be based on external stimuli: namely, normal visual signals from the eyes.

Introducing the David 8 - The Next Generation Weyland Robot