If a tree falls in a forest, does it really make a sound?
If beans are spilled in a suburban loungeroom, is a conspiracy really revealed to the world?
"Fake Moon Landing" and "Fake Climate Change" are implausible because they are so high-profile, public and trans-national, and "Chemtrails" because burning jet fuel in air is so violently destructive of chemistry.
None of those are implausible purely on the scale required.
- Katyn Forest was real.
- Treblinka was real.
- Nuclear Winter was not real.
- Eating carrots does not help you see at night (but it was a good cover for the deployment of radar).