Pretending there are things we don't or can't know for an absolute certainty is just playing silly word games. Cofty
This is one of the more ridiculous and illogical statements so far.
To acknowledge that there are things we don't know is an act of wisdom, prudence, and frankly is the first step toward being able to understand anything at all. To say otherwise would demonstrate gross hubris and stupidity. No scientist would ever discover anything if they took such a position.
To acknowledge that there may be things we can't know is a slightly different thing. But an assertion that that there is no such category of knowledge* clearly cannot be substantiated. If such a thing as a multiverse exists, we would by definition not be able to have knowledge of it. But are you going to say that it is therefore logically impossible? You would find it difficult to obtain support for such a position amongst intelligent company I venture.
These statements are not "silly word games" Cofty. Neither is it "pretend". This is reality my friend, and unless you acknowledge that you will continue with your illogical conclusions.
[*Knowledge in this case would have to be defined simply as "that which can be known by at least one being", since if we limit it to "that which can be known by humans in our universe" then of course there would be nothing that fits the second category.]