A state at which every sentence is true, i.e., a trivial world. In many semantic analyses of conditional logics using possible worlds, a sentence $\phi \square \to \psi$ is true at a world $w$ if $\psi$ is true at the possible world most similar to $w$ at which $\phi$ is true. Absurd worlds provide a novel way of modelling the satisfaction of these truth conditions when $\phi$ is a contradiction: one can take the absurd world to be the most similar world at which the impossible antecedent $\phi$ is true, at which any arbitrary $\psi$ is true as well.