The Publicity of Thought and Language

I try to clarify the ways in which one would seek to hold that language and/or thought are public. For each of these theses, I distinguish four forms in which they can be framed, and two ways of establishing them. The first will try to make the publicity of thought follow from that of language; the second will try to make the publicity of language follow from that of thought. I show that none of these strategies can do without the thesis that language and thought are interdependent, and that even while admitting this thesis, the second strategy presents more difficulties than the first.