I thought you claimed "there's nothing wrong with deflation" too. Sorry, my fault.

By "undeniable truths" I mean premises that are obvious to anyone and that no one will discuss. Logic is part of math, is not a social science.

I agree, I prefer gold over USD. But national inflationary (I prefer this term over fiat because I don't think fiat is bad per se, in fact I consider bitcoin fiat) currencies are not the only alternative.

I think business cycles are avoidable because I think their root cause is interest.

I consider gold and bitcoin flawed because they have interest. I advocate for ripple and freigeld (freicoin if you want to keep the state out of its issuance) and ripple instead. Well, I advocate for bitcoin (it's enough hard to explain it without the demurrage, one step at a time) and I recommend people to buy gold and silver (to protect themselves against what I see as the "unavoidable global fiat system collapse"), but I think they won't be the "money of the future" because of their flaw.

I bet you're going to answer with one of these two:

-Without interest people invest in stupid things.
-Demurrage is isomorphic with inflation.

But those questions are not about deflation. If you want, we can discuss those points here: https://bitcointalk.org/index.php?topic=3816.0
Probably I will start a new thread "Why demurrage is not equivalent to inflation".