It is easy to stop believing in bull****. After all, bull**** doesn't spread by itself. Someone have to believe the bull**** to pass it on. I've slightly reworded the original
0. Assuming anything any one told you is bull**** unless disproven (by following)
1. Who is telling me "this"?
2. How does s/he know "this"?
3. Given #1 and #2, could s/he be wrong?
4. If yes, maybe, or "I dunno", find UNRELATED source that says the same thing, then apply the SAME TEST (Go to 1)
5. If you got here, answer to 3 must be "pretty f***ing unlikely".
Congratulations. You now have something that may not be bull****.
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Remember: just because someone says something that "makes sense" doesn't mean it's true.
Let us take a recent example... Vani Hari, i.e. "Food Babe" rant about some chemical that she claims was used to make yoga mats. That's NOT TRUE. The chemical, which makes harmless bubbles, *can also be used* to make yoga matts, which is bubble foam. She knows nothing about science or food safety. She's selling her looks (calling herself "Food Babe", eh) and trying to parlay her followers into spreading misinformation. That is just plain STUPID.
Let's apply the test... Should you believe Food Babe's warning about azodicarbonimide in Subway's sandwich bread?