In this paper, I briefly outline the notion of a truth-conditional meaning-theory and introduce two prominent problems it faces. The“extensionality problem” arises because not all correct specifications of truth-conditions are meaning-giving. The “explanatory problem”concerns the extent to which truth-conditional meaning-theories can contribute to the task of clarifying the nature of linguistic meaning.The “principle of humanity” is supposed to resolve both issues simultaneously. I argue that it fails to do so.