I'd suggest you do some reading on epistemology, as you seem to be interested on ideas abut the nature of knowledge and how it is acquired. I'm not going to respond further, as this particular debate is silly, but the general questions you ask are not. They are trying to tell us that there are things like theta particles not covered by the standard model. The current model of physics has enormous experimental, mathematical, and observational support. They are proposing theta particles, so the burden is on them to prove their existence. That also addresses your question about Scientology. If they have such evidence and experiments, I'd love to see them, but otherwise just maintaining 'No, it's a conspiracy!' means nothing.

But you don't prove this by just saying it, you prove it with evidence and experiments. Perhaps it all is a lie, and that everything we've read is untrue. Just saying it's a lie is not an argument they'd have to show how it's a lie. So, the burden is now on them to show why all this evidence for the round Earth is false. These things have themselves been tested, and no 'evidence' or explanations that the flat-earthers have thus far offered have stood up to testing. The case is the centuries of accumulated evidence, experiments, mathematical proofs, photographs, accounts, etc. It's not that you don't have to prove your own point, it's that the spherical Earth case has already been made. Similarly, if you wish to propose something, the burden is on you to show why it's true and not on them to show why it's false. If you wish to challenge something, the burden of proof is on you to show why it's false, not on them to show why it is true. New to reddit? Click here! Get flair in /r/science Previous Science AMA's Repeat or flagrant offenders will be banned.Comments dismissing established findings and fields of science must provide evidence.Criticism of published work should assume basic competence of the researchers and reviewers.Non-professional personal anecdotes will be removed.No off-topic comments, memes, low-effort comments or jokes.All submissions must have flair assigned.No blogspam, images, videos, or infographics.Research must be less than 6 months old.No editorialized, sensationalized, or biased titles.No summaries of summaries, re-hosted press releases, or reposts.Directly link to published peer-reviewed research or media summary.

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