•A
Priori Languages
• “They
are universal systems; they are comprehensible to speakers of different natural languages and are perfect in the sense that they permit neither error nor
ambiguity. They are a priori, in that they are based not on the rules which govern the surface structures of natural languages, but rather, ideally, on a presumed deep grammar common to all natural languages. They are, finally, philosophical because they presume that this deep grammar, based on the laws of logic, is the grammar of thought of human beings and machines alike” (SFPL 311).