[Fredrick]

Here is another example of what string theorists, according to me, are doing: it can get quite complex as in the following thought duel:

A/ He knows. B/ I know that he knows. (the basic set up of knowing)
In string theory:
C/ He knows that I know, but he doesn't know that I know that he knows. D/ Or am I the one who doesn't know that he knows that I know that he knows?

In this thought duel about knowing, you can see how easily it is to get confused about who knows what. Still, we can boil this down to two players having thoughts about the other person (though in reality the duel is inside the mind of just a single person, but the other person is a real person, too, of course). Same goes for string theory: while there really is a distinction between him knowing that I know that he knows and him not knowing that I know that he knows, there is no additional level of knowing, it is only a specialization of knowing.

String theory mentions they have additional dimensions, but in reality they are only pointing to specific aspects of the normal dimensions already covered. As such, they have real additional aspects, but no additional dimensions.

Again: there are just two people involved, both busy knowing. Though various levels of knowing can be obtained, there are still just two people knowing (or contemplating knowing).