I'll explain just for you though. The normal way of thinking is in base 10 that is all numbers 0-9 exist and in this base 2+2=4, in fact any base 5 or higher 2+2=4 and since the premise of a 2 doesn't exist you can even say 2+2 so that rules out base 2 also known as binary from being used in this case so that leaves base 3 and base 4. In base 4 all numbers 0-3 exist that means 2 exists and means 2, but that means that a 10 is actually 4 so in base 4 2+2 = 10 so now if we remove 3 from the possibility and thus move to base 3 then all numbers 0-2 exists so a 10 is actually 3 so to make four in base 3 it is 11 ergo 2+2=11 is a true statement just an ambiguous one where by normal thinking all numbers are assumed to be in base 10, but you don't necessarily have to state which base you're using for it to be a factual statement lest you'd have to state you were using base 10 anytime you do anything in base 10 and we don't we just make that assumption by default.
