They can be real! Yes genuine psychics can see the past, present and future in a way that is outside of science. Psychics can also communicate with the dead. The best proof of this is psychics that help police solve crimes: the evidence is very overwhelming. Just watch many episodes of "Psychic Detectives" and "Psychic Investigations" and related. (These shows are available on YouTube, and there are hundreds.) So what does this mean? First, it is profound proof of the supernatural. Second, psychics are not inherently evil, and in fact, can be Christian. (See the Tyson Efird YouTube video below.) Third, only God knows the future precisely. Therefore, it is a gift from God, amazing as this is, especially to a scientist. It also underscores that ultimately we live in a universe designed by an infinite, supernatural God, permeating all space and time, and that our consciousness is part of this universe, not limited by our scientific understanding or the natural world. However, of course, not all psychics have the same gifts, and not all psychics are genuine: there are many frauds. Of note, many skeptics are also frauds, and they will do anything to preserve their world view that nothing exits outside the natural world.
A few of many, many psychic detective shows: