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Re:If-then-else had to be invented by phkahler on Sunday December 13, 2020 @01:18PM (#25408703)
>> Set union: they can read and write’

>> Set intersection: my jeans were creased and dirty

IMHO those are both unions. One describes two capabilities people have while the other describes two conditions some clothing has.

They both become intersection when using the pair of conditions as selection or decision criteria.

It's the difference between an assertion and a question.

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