Since you seem so interested in arguing semantics would it help if I said that for all intents and purposes, so far as the issue applies to the question at hand, FEers know that FE has been proven? You and I just frame it as belief because we disagree with them; FEers don't see it as a belief, but as the truth, period.
I only argue semantics because, in this case, it makes a significant difference... am I right?
Rather than framing FET as a belief because I disagree with it, if FErs feel that it is not even necessary to objectively view their own
truths, I think it would be safe to classify flat earth theory as a belief system rather than a scientific theory... No?