[...] A-positions, in which A-GFs are defined, corresponding to what are often called "argument positions" […].
- Chomsky (1993), a pag.178

An A-position is one in which an argument such as a name or a variable may appear in D-structure; it is a potential θ-position.
- Chomsky (1993), a pag.47

The positions in which these GFs are assigned are sometimes called "argument positions" , but since I am using the term "argument" in a slightly different way, I will avoid this terminology, referring to them rather as "A-position" and to the GFs determined in them as "A-GFs".
- Chomsky (1993), a pag.47