User blog comment:Tachyonic Encrypter/Getting bigger than Rayo's function. Is it possible?/@comment-1605058-20141121123833

Another two issues:

First, relativity. We have to specify exact frame of reference, because otherwise it's impossible to judge, when given two events, which of them happened first, nor if they were simultaneous. So, if we consider someone thinking about an equation, and some clock timing when we stop considering the equations which contribute into Tachyonumber, then you and me can have different opinions if the thought happened before time ran out.

Second, time travel. You mention elsewhere that it breaks the rules, but in what way can we prevent someone from far future coming here and thinking about the value of Tachyonumber? If you just say that time traveller thoughts don't count, then such a time traveler could tell me the value of this number, and then I'd think about it. In either case, we again hit the problem of this number having to be larger than it is.