You know you’re conscious right now. You’re having an experience of reading these words. There’s something it’s like to be you. But what is that “something”? This is the hard problem of consciousness. Not how the brain works — we’re making progress there. Not even how we process information or respond to stimuli. Those are the easy problems. The hard problem is: why is there any inner experience at all?...
Solipsism is the idea that only your mind exists. Everything else — other people, the external world, this sentence you’re reading — might be fake. It sounds crazy. But here’s the logic. You only have direct access to your own thoughts and experiences. Everything else comes through your senses. But senses can be fooled. Dreams feel real while you’re dreaming. Hallucinations seem genuine to the person having them. So how do you know other minds exist?...
Most people think free will means you can choose what to do. That’s not the real question. Of course you can choose. Right now you could choose to close this tab, make coffee, or text someone. Nobody disputes that. The real question is whether you could have chosen differently. Not just whether you had options. Whether, if we rewound the universe to this exact moment — same brain state, same thoughts, same everything — you would actually pick something else....
You decide to reach for your coffee cup. Simple choice, right? But here’s what’s strange. Scientists can predict that choice before you’re aware of making it. They hook electrodes to your brain and watch the electrical activity. A few hundred milliseconds before you “decide” to reach, your brain shows a spike of activity. The decision happens first. Your awareness of deciding comes second. This isn’t just true for coffee cups. It works for bigger choices too....