Particularly in those schools, to say that test results are reflecting what's happening is an invalid assumption.

But the authors cautioned against the invalid assumption that if a person takes aspirin, other heart-protecting measures can be ignored.

The trouble is that the armchair economist, like other economists, makes lots of invalid assumptions.

Correct calculations are not always correct-if based on faulty principles or invalid assumptions.

Most executive education has historically been based upon an invalid assumption, "If they understand - they will do."

In the first place, you make an invalid assumption.

Either I'm behaving irrationally or my analysis of bidding strategy contains an invalid assumption.

They suggested that the Price equation is based on certain invalid mathematical assumptions.

The creationist claim is based on further errors and invalid assumptions.

Another more commonly encountered form of brittleness is in graphical user interfaces that make invalid assumptions.