On the lunacy of free will

[Astreja]

If most people believe in something, how likely is it that they're all wrong?

Wrong beliefs can be passed down from generation to generation, and taught to children before they have critical thinking skills.

If billions of people believe that the sun rises in the east, and you can look to the east and see the sun rising, the belief is almost certainly correct.

If billions of people believe that there's such a thing as life after death, but none of them can produce scientific evidence for it, it's probably a myth that came about as a reaction to the fear of dying, and there's a high probability that all of them are wrong.

A large number of proponents does not make something true. It depends entirely on the claim itself, and whether it's supported by evidence.