I'm not exactly sure what he meant by that. I need to ask him about it.

When I said that I'm not exactly sure what I meant. Boy, it's sure been true. It's been an absolutely fantastic magic carpet ride.

I'm not exactly sure what he does. But whatever it is, it is very effective.

They told me ... well, I'm not exactly sure how it was chosen.

[I was] not exactly sure why all the things were being advertised. It didn't resemble anything I had agreed to do.

Unfortunately there was some malfunction. Exactly what caused it we do not know.