There are dozens of different scientists and scientist on its own.
Yes but then it is comparing scientist to other kind of scientist, not to engineer. I can compare types of engineer to each other and the same for scientist, but not scientist to engineer.
The problem is, since it asks for your current quote it normalises to this each time, so there is no way to make a direct comparison of different searches. Or maybe I'm being thick and not doing it right, I'll check again.