Mojo
Mostly harmless
IIRC, Jabba claims that souls exist under his OOFLam as well - they're just not immortal. I could be wrong, but Jabba is liable to make any damn fool claim at all and reverse himself the next week.
He says that souls don't exist under "OOFLam", but contradicts this by factoring them into his assessment of the likelihood of his existence under "OOFLam".
His argument on this point seems to be that if he assumes in his premises that "OOFLam" is wrong, he can prove that it is wrong.