It depends how you define "objective" and "subjective" since these are not terms of logic. The basis of propositional logic is the law of non-contradiction, which can be expressed as "~(p & ~p)" (not (p and not p)). read more
Logic is objective in its absolute form, hence mathematics and its ability to model physics, however subjective logic is merely an ATTEMPT to produce structural equivalence with the objective structure of reality, hence our ability to be wrong about what is mathematically true, although something like 2+2=4 will always be an a priori truth which could never be false, as it follows deductively from the definitions involved. read more
Subjective logic is a type of probabilistic logic that explicitly takes uncertainty and source trust into account. In general, subjective logic is suitable for modeling and analysing situations involving uncertainty and relatively unreliable sources. read more