it's not like in the movies where someone can just 'see' the future or someone 'knows' what the other person is thinking or what's going on in a remote location.

most of the time they're isolated incidents that happen merely by luck or chance. they're not things people can control. mostly spontaneous in nature (at least in my experiances).

so if you're going around looking for someone to prove to you that clairvoyance/precognition exists, some certified psychic, you're going to have a hard time.