What Kind of Day Has It Been? - S1-E22
Other mistake: I call this one an "Escher Mistake". As Donna and Josh near the end of their chat about the chair that needs repairs, they pass an office door on their left (Nancy McNally's office) just before going through another doorway. The camera that follows them passes "through" a solid wall and emerges in an office, facing a hall and stairwell as Josh and Donna enter from our left as if this has all been a continuous shot. But the camera-through-the-wall moment is actually a cut so that the actors can be on a totally different part of the set. This would be fine, except the staircase they are about to turn left to and climb only rises up about 3 feet, then the user turns left again and heads to our left - but that sends the user into McNally's office, and does so 3 feet off the floor, yet they are seen entering the press room instead. (00:11:50)
The Crackpots and These Women - S1-E5
Other mistake: When the President and his staff stop preparing for his upcoming press conference they decide to meet again "this afternoon" implying that it is still morning. In the very next scene Sam meets with the representative from United States Space Command he tells Sam that at 6:35 AM local time UFO's were detected over Hawaii. That's not possible. Hawaii is 6 hours behind Washington D.C. If it were noon in Washington, it would only be 6 AM in Hawaii, 35 minutes before the time the gentlemen mentioned.
Chosen answer: A really annoying innate lack of sense. My friends and family say the same thing all the time, and I'm endlessly trying to correct them. I think people just don't know any better and (ironically) couldn't care less that they're speaking incorrectly.