> by defining exactly what you mean by "speaking", if not literally "speaking"
conventions already exist.
If I say "99% of cats prefer whiskers", this needn't mean that of a worldwide population of 12,000 cats, exactly 11,880 prefer whiskers. It's understood as a statistical statement.
If I hold a gun to your head and tell you not to speak, it is understood you are not being allowed to speak, despite the fact that you are still able to do so. "not allowed" can conventionally mean "influenced in speaking freely".
In this case, whatever the standard of "not allowed" is, we don't need a formal definition when we have the actual example to hand; The implication here is no due respect is given to the scientist because they have an opposing view, marginalising opposition (e.g other scientists will not be keen to get the same treatment, and so less likely to speak up).
You have the rose to smell, there's no need to argue it's name.