I must repeat the question: who were you referring to?
Oh, dario, you should know. Chomsky ‘coined it’ to account for PL and LF in generative syntax. You came out with his ( Chomskyan) D and S structures here , did you not ?
At “S-structure” ( should be taken ironically here as our ‘mental transformed output’ :), mg was referring to the irrelevance of dragging up the above terms to prove your point. This is pure generative grammar, has nothing to do with semantics, hence ‘that’ distinction between phonological and logical form that Chomsky came up with.
Even if we imagine ( theoretically ) for a while that the phrase ‘CPE’ is at D-structure tree and ‘CEP’ ( or whatever is there ) is at S-structure tree , the former would be in a theta-bar position and then it cannot be construed as being at D-structure in the first place. By the way, Chomsky ditched the idea of D/S-structures many years ago.
But other than that, guys, I really don’t know what all this spat is about here ? CPE , CEP, CIA, FBI, FSB..KKK haha …What difference does it make ? :)