Your best bet is probably a large dose of peer reviewed papers then. Journals and such. This way unless the evidence is all backed up and passes a board of experts etc etc it doesnt get published, thats as close to fact as you will get. I will warn you tho, some of them are etremely hard to read if you dont have an extremely high profiency in the subject. However abstracts and summaries are generally good enough to tell you whats happening, without being confusing.
Unseul
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