Consciousness & the Hard Problem

Consciousness and the Hard Problem · Open board

Draws the gap this lesson is about: everything a brain does, laid out on one side, and whether any of it is actually felt from the inside, on the other.

Before you start. The Mind-Body Problem left you with functionalism: a mind is defined by what it does, so a brain and a machine that behaved identically would count as the same kind of mind. This lesson is about the one question that answer never touches: why doing any of it feels like anything at all.

Two of this track’s Try-its, here and in Can Machines Think?, ask you to talk to a chatbot. Any free one will do; if you’d rather not use one, read those steps as thought experiments and you lose nothing the lesson needs.

The idea in 30 seconds

Science can explain everything a brain does, but not why doing it comes with a felt experience at all; that gap is the hard problem.
Qualia are the felt part itself, the redness of red, the ache of a papercut, and no outside description explains why they exist.
A being that did everything you do with no experience behind any of it is a philosophical zombie, and no test from outside can rule one out.
If a body could act exactly like you with no inner experience at all, then even your own claim to be conscious is explained by brain activity alone, not by the experience itself.
No test built only from what a system says or does can tell you whether anyone is home, in a person or in a machine.
Capable and conscious are different questions; a fluent chatbot only ever answers the first one.

Read the story · Skip to the numbers