Too Broad, Too Narrow
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A definition is too broad when it admits non-members, too narrow when it excludes members.
Show
"Bird: an animal that flies." Too broad — bats get in. Too narrow — penguins are shut out. Both failures, one definition.
Watch for
Always run both tests. Fixing one failure routinely creates the other.
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Unlocks
- Nothing yet depends on this.