Diuretic
Permanently confused
We don't know that he was or if he was willing to stand still long enough so that GAtes could note it. I imagine it was his intention to report the officer.
In this case I think the cop had a good reason to ask for ID. The house had been called in as a possible burglary in progress and Gates approximately fit the description of the suspects. That the cop then refused to show his own ID is inexcusable.
If the cop was in uniform and was wearing his rank and had a name plate presumably some part of his uniform also had his identification number, then ask yourself why Gates demanded the cop's id.
Cops here do not always wear a badge and name tag. I had to ask a cop for ID once. His badge was in his wallet.
Indeed, we don't know.