Wikipedia explains R&B
For the concept of “replaceability” in logic and mathematics, see Axiom schema of replacement.
Beautiful.
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Yes!
Where: E=existential qualifier U=union relation e=membership relation S=set of all R&B songs J=set of all set theory jokes F=is funnier than
(x)(y)(x e S & y e J -> ((Ez: z = x U y) -> Fzxy))