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Reading a statement exactly, and the arguments that prove something is impossible.
11 skills · 53 problems · see this strand in the graph
Assumed by everything above it.
The working middle of the exam.
“knights always tell the truth and knaves always lie”
“match each person to their pet”
“who finished third in the race”
“he had six left at the end”
“one of the coins is heavier than the others”
What the 5-point questions actually ask for.
“show that this is impossible”
“whatever moves you make, this stays the same”
“can the board be covered by dominoes”
“show that no such number exists”
“consider the largest of the numbers”