The validity (or lack thereof) of meaning as a "property" of a linguistic expression ("utterance") is a central focus of Wittgenstein's Philosophical Investigat

The validity (or lack thereof) of meaning as a "property" of a linguistic expression ("utterance") is a central focus of Wittgenstein's Philosophical Investigations. If "neglected" ideas are the focus of the most popular philosophy book of the last century, they probably aren't all that neglected.