1. It is not pseudo-science if EVERYONE believes it, if the proof to the contrary is flimsy at best, and we have tons of proof that it is so.

2. Scientism is defined as "excessive belief in the power of science", therefore it has nothing to do with pseudo-science ("a collection of beliefs or practices
   mistakenly regarded as being based on the scientific method")

I have a question. How thick is the flat earth ? Is the Sun flat too ?

Are all the planets flat, or are you going to go with the "EVERYTHING is a lie made up by the government to control us".
in which case...
how are you alive ?

If there's a global conspiracy that only you and a select few know of... you do realize you'd all be dead, right ?

They. Have. All. The. Armies. and. control. all. of. mankind. through. apparent. mass. hypnotism.

If the earth was flat and everything was a conspiracy by the Uber-Government, then they could just whisper to your local police force "he's annoying" and they'd eliminate you.
And find a sudden appearance of tons of incriminating material to accuse you of secretly planning to murder the entire royal family.

I'll never understand how some people can believe the entire political class is in a gigantic conspiracy against them and not realize they would have already won if that was the case.