Originally Posted by Bostonian
Arthur Jensen, one of the signers, would meet anyone's definition of an expert on intelligence.
This is devolving into silliness. The implied force behind that letter is that supposedly an overwhelming preponderance of experts signed it, suggesting a field-wide consensus. This is manifestly false.

Now you've backed off to the position that One Guy signed it, and we should all be impressed by Mr. One Guy. That's not how scientific issues get settled.

It should at the very least give you pause that other equally eminent experts (we don't even know how many) were asked to sign the letter and refused. At a minimum this should suggest to you that there are controversial issues here that should be investigated on their own merits, not settled by saying "But an expert said so!"