But the thing is I can’t prove its true. I can’t prove that this is a dream and the people are fake anymore than I can prove it isn’t a dream and it’s all real.
No you can’t. That’s life. Nobody will ever know the truth. But humans will always think they have it, despite evidence to the contrary. Whatever you decide can be true only to you and no one else. Everyone will always have his own “truth” that will be inaccessible to everyone else.
And that’s the beauty of the Mirror Neuron System which allows one’s mind to recognize and experience the same “emotional and physical response* experienced by another.
If we use a mathematical model, all brains are fundamentally similar in fundamental survival functions and should be able to recognize its environment to varying degrees of necessity. That’s where it starts.
Humans live in very complicated world with a great variety of environments. We need a sophisticated brain, but so does a Whale.
Even if each lives in his/her own reality, we also share many things in each other’s realities. Sports are but one example!. And then, probabilistically, there will be someone who’s reality is really close to yours and vice versa. Then you have achieved Understanding and Empathy, Friendship.