And I think that's a valid assumption for a play.

Another way of looking at it is to make two relatively valid assumptions.

I think people can make more valid assumptions at the halfway point than a month before.

He still thought that was a valid assumption, but it didn't explain the antiaircraft missiles.

But, in an age of suicide bombers, this may not be a valid assumption.

Conal worked that out, too, and wasn't sure it was a valid assumption to make.

This is not a valid assumption for species with complex life histories.

In no case were these assumptions valid, of course, particularly not in this day and age.

Assuming teachers and support staff are working full time (maybe not a valid assumption I grant you) the total cost doesn't change.

Then again, remembering Quigley, that might not be a valid assumption.