Weekly Challenge
Five original questions for the week of October 5, 2026. No timer. Check each answer as you go.
The museum's new exhibit will draw record crowds because it features the famous Blue Diamond.
The argument assumes that
A famous artifact only draws crowds if people hear about it. If nobody knows it is there, the conclusion fails. Negation test confirms it.
No reptiles are warm-blooded. Some pets are reptiles. Therefore, some pets are not warm-blooded.
Which of the following follows the same pattern?
Same form: No A are B. Some C are A. Therefore some C are not B. Only A matches all three moves.
Either we build the new stadium or the team will leave the city. We cannot let the team leave, so we must build the stadium.
The argument is flawed because it
This is a false dilemma. The team might stay without a new stadium, or the city could renovate the old one. Two options are assumed, not shown.
The package arrives on Tuesday if it ships on Friday. The package did not arrive on Tuesday.
What follows?
If it had shipped Friday, it would have arrived Tuesday. It did not arrive, so it did not ship Friday.
A city painted its crosswalks bright yellow and saw pedestrian accidents drop 15 percent. Officials credit the paint.
Which of the following, if true, most strengthens the officials' claim?
The drop happened exactly where the treatment was applied and nowhere else. That pattern points at the paint, not a citywide trend.
A free diagnostic shows your starting score, then a study plan tells you what to work on next.
Last updated October 12, 2026