That's a good question. I've had it tested by an expert on all that at UCIrvine.
They probably threw out my test, in that there was no space for I don't know but I smell something. Let's say there were 80 vials to smell. I smelled nothing on, say, seventy two, and something on the remaining eight, of which I probably got two correct.
Since there was no choice for I don't smell it or I do and don't know, on those questions, I just put the first choice, and announced that on the test.
I sure hope they've fixed that questionaire. That was back in the eighties.
It was a hopeless episode for me except that I liked the doc intern who did the testing of me - she was from China, had lived near Tiannamin square, however you spell that. I liked her, but what she made of me, I don't know. I kept saying no.
Myself, I figure I can smell a bit sometimes. Ginger, for example. My father didn't smell at all, he said, so I figure it as another hereditary thing.
I definitely can taste and love food, but I'll posit my interest in spices is reactive to either an early life in blandville or a need to pump up my taste buds.