
An assumption is an unstated premise that MUST be true for the argument to work.
Two types:
Sufficient: If true, conclusion is guaranteed.
Necessary: Must be true or argument collapses.
The Negation Test (necessary assumptions):
Negate each answer choice. If negating it destroys the argument, it's the assumption. If negating has no effect, it's wrong.
Example: "All dogs are friendly. Therefore Rex is friendly."
Assumption: Rex is a dog. Negate: Rex is NOT a dog. Argument collapses. Confirmed.
Reference:
TaskLoco™ — The Sticky Note GOAT