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Practice bank for UCAT Decision Making questions testing your ability to identify logically equivalent statements and correct negations.
Two statements are logically equivalent if they are true and false in exactly the same situations.
| Original | Equivalent Form |
|---|---|
| If P then Q | If not Q then not P (contrapositive) |
| All A are B | If something is A, then it is B |
| No A are B | If something is A, then it is not B |
| Not (P and Q) | (Not P) or (Not Q) — De Morgan's Law |
| Not (P or Q) | (Not P) and (Not Q) — De Morgan's Law |
| Original | NOT Equivalent |
|---|---|
| If P then Q | If Q then P (converse) |
| If P then Q | If not P then not Q (inverse) |
| Some A are B | All A are B |
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