From: Farley Flud <ff@linux.rocks>
Subject: Re: Why Python When There Is Perl?
Newsgroups: comp.os.linux.advocacy
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On Sat, 23 Mar 2024 23:10:03 -0500, Physfitfreak wrote:

> 
> 
> But still some ambiguity remains in my mind.
> 
> (A AND B) = (B AND A), and (A OR B) = (B OR A). They commute, so to 
> speak. But (A IMP B) doesn't commute. 
>

It does, in a sense.  The "opposite" of A => B is ~B => ~A.

If a number is not odd (not in set B), then it is not prime
(not in set A).

(Keep in mind that set A is all primes >=3 and <=100, so
it excludes 2.  See previous post.)

The same truth/false conditions apply:

True for "B OR ~A".

False for "~B AND A"