Philosophy
The Hard Problem of Consciousness and Qualia
Quick fact
Philosopher David Chalmers coined the term 'hard problem' in 1994, and he famously argued that no purely physical account of brain function can explain why we experience anything at all.
Why this is interesting
Think about the first time you tasted coffee—the rich, bitter warmth spreading across your tongue. How can the squishy, electrochemical activity in your brain create that feeling?