4 ms·
I think about it as: "90 and above" is the smallest set X satisfying both: * 90 is in X AND * Above(90) is a subset of X Another description of this set is
by MichaelBurge 11y ago
I think about it as:
"90 and above" is the smallest set X satisfying both:
* 90 is in X
AND
* Above(90) is a subset of X
Another description of this set is:
An element x is in the set "90 and above" if x is 90 OR if x is in Above(90).
AND/OR are dual to each other, and it's just a matter of perspective on whether you're building up the set(OR) or constraining the set(AND).