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Quite probably. They're welcome to disagree about the reality we are literally discussing right now, just as there were no doubt members that disagreed with the realities outlined in the letter, and in taking part helped cause the situation (that according to you they are denying) in the first place.

But just as many academics do.

A lot more journalist don't agree too, which is perhaps why those academics got so much airtime.

Even in the legal system "expert testimony" can be a dubious process - in the court of press-media there is no bar to cherry-picking.