The key to yet unknowable

Is there absolutely unknowable? In principle, yes. For example, infinity. Nevertheless, how and as far as it is possible, close to get to the essence of this incomprehensible and indeterminable - a kind of "thing in itself"? Is there a key to the unknowable? Apparently, only some model could give an approach to the unknowable, if, of course, it will explain what remains incomprehensible for those researchers who use only experimental data and analytical-synthetic methods. Below are examples of an explanation of a similar, hidden from conventional research methods.