Things that are fake:

- Alpha males (debunked by the original researcher)
- MSG causing headaches (never replicated)
- Learning styles (no evidence)

Things that are real:

- People will believe anything if it confirms their priors

@Daojoan Absence of proof is not proof of absence. The most you can say (logically) is that the answer to your question (e.g., does MSG cause headaches) is “unknown.”