the ability of two or more things to exist or work together without problems; consistency

unable to exist or be used together; inconsistent; (in logic or math) mutually exclusive

to be as incompatible or irreconcilable as ice and hot coals; describes two opposing parties that cannot coexist or tolerate each other

(physics) the Pauli exclusion principle, which states that two identical fermions cannot occupy the same quantum state simultaneously

conditions for consistency; compatibility conditions