1. That it is omniscient.
- To know this, any god would need to know that it knows everything, but how could it be aware of something it doesn't know about? It could only know what it knows it knows. It could not possibly know about something it doesn't know about.
- As Donald Rumsfeld once painfully reminded us, there are unknown unknowns.
- So any claim it might make about omniscience may be false and can not be made with any certainty.
2. That it is omnipotent.
- Leaving aside the obvious paradox that no god can create an object so heavy it can't lift it, unless it knows everything it can't possibly know if there is something more powerful about which it is unaware. If there is, clearly the god can't be all powerful since the more powerful thing could have power over it.
- So any claim of omnipotence may also be false and can not be made with any certainty.
3. That it is omnipresent.
- Unless it knows everything, it can't possibly know if there is somewhere where it isn't present.
- So any claim of omnipresence may also be false and can not be made with any certainty.
To make a claim of fact in the knowledge that it may be false is dishonest, so one thing we can say with certainty is that any god for which its followers claim omni qualities is a dishonest god at best.
Of course, that's not really fair on these gods. It's not the fault of gods that they were unintelligently designed by dishonest people.