People are also tend to assume that "all" or at least "most" or "many" are implied when there's no qualifier before a claim:

"Scientists say the earth is only one hundred and twenty-five years old."

"Critics are raving about 'Abbott & Costello Meet Brexit'!"

In fact, such a claim is literally true if only *two* individuals hold the position.

And if the speaker is even more unscrupulous, *one* might do.

But *none* would simply make him or her a liar.

The point, however, is that it's hard not to think of "all" scientists and critics or whomever when we first encounter such statements.