If City would have approached Raiola for any of his players, Pep would never have openly said that Raiola offered his players to him. Moreover, Raiola would have responded in a ferocious manner to this allegation.
I think you are chosing to ignore the blunt truth. Raiola himself has said that he offered his players to City but he just did not confirm whether it was Pogba or not.
However, if anything that Pep said was a lie then Raiola would have explicitly specified it that but instead he offered an unclear response as he is no position to deny the facts that Pep pointed out.
Look at the Raiola's tone on this matter when he was bashing Pep as coward and what not just a week ago. If this was a lie, Raiola would have mortified Pep badly.