The original and most famous hard problem, of which consciousness is the core. How can the subjective, qualitative, private world of mental phenomena (thoughts, feelings, sensations) interact with or be identical to the objective, quantitative, public world of physical processes (brain states)? Every solution seems flawed: dualism invokes magical interaction, materialism struggles to locate the felt experience, and panpsychism seems bizarre. The problem is the seeming unbridgeable ontological gap between two categories of existence.
Example: "The neuroscientist pinpointed the exact neural correlate of my decision to raise my hand. The hard problem of the mind-body problem is this: what, in that flicker of voltage and chemistry, is the felt intention, the 'I' that decided? The brain event is there, but the experience of willing seems to hover, ghost-like, above it."
by Abzugal January 30, 2026
Get the Hard Problem of the Mind-Body Problem mug.