But ...
Again, I think you've got it plumb backwards. (As lots of people do -- not really a surprise. Or anything to be ashamed of.) No transcendental signified? OK, but it does seem we have meanings, albeit our signifiers lack signifieds. No?
(You know what a bus is and what a bed is. That is, you know the meaning of "bus" and "bed", even though there is no Platonic Form of a bed or a bus (or, no 'object' to be their meaning, as Ludwig Wittegenstein had it. Etc. (I'll not insult you with an explanation of why that no.43 bus isn't the right sort of object here)). And so on.)
So what? So, as it turned out, signifieds are not transcendental after all. Our meanings do fine without. Condition of the possibility of meaning? Interesting question. But the answer isn't that infamous Derridean signified, for certain sure.
You told me what 'belief' means and then go on in another post to deny meaning tout court - "postmodern chaos ... simply is ...". See?
Interesting connection to Nietszche (I'm not sure you've understood him quite correctly, but let that pass). Just as we don't need a signified in order to have meaning, so we don't need a God in order to have ethical or moral values.
Who knew? Well, Plato/Socrates for one. Read the Euthyphro recently?
[Incidentally, taking you up on the claim "mathematical facts are easy to establish" ... I've been wondering: supposing we don't accept the axiom of choice, are there any (strongly) inaccessible cardinals? Easy for you, perhaps; maybe you could let the rest of us know?]