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The individual scientist may continue to have faith in their own speculation, but that is independent of the scientific conclusions.

Well said.   The beliefs are personal things, whereas the science seeks rational objectivity.

Which is why The Community of Scientists, scientists who are curious, skeptical, competitive and always looking for mistakes in the work of others (as well as their own), is a key aspect of science, one that receives way too little attention when dealing with contrarian rhetorical fancy dancing.