"!a OR b" excludes "3239043b389bb65bd0a1ed3fbd539f-Why?

[armsys]

"!a OR b" excludes "3239043b389bb65bd0a1ed3fbd539f7e.jpg", even though the (file)name contains "b".
It seems to deviate the basic rule of OR.
Why? What's the logic?

[admin]

Logic: (NOT a) OR b

[armsys]

Logic: (NOT a) OR b

I'm sorry. I don't get it.
OR returns TRUE if either or both operands is true.
In this case, "3239043b389bb65bd0a1ed3fbd539f7e.jpg" contains "b" and doesn't contain "a". So both operands are TRUE.
So it should be included. But it isn't!

[klownboy]

But, there is an "a".

[armsys]

But, there is an "a".

Yours sounds more like an AND operator, namely:

Code: Select all

(!(*a*)) AND (*b*)

That's, in order to be included, it must satisfy BOTH conditions concurrently:
1. The name cannot contain an "a".
2. The name must contain a "b".
Does it sound like an AND operator to you?

On the other hand, why does "!a OR b" includes "Membership_transter_form.pd"
While both "3239043b389bb65bd0a1ed3fbd539f7e.jpg" and "Membership_transter_form.pd" contains "a" AND "b", "!a OR b" excludes the former but includes the latter. Why?

[admin]

Please wait for the next beta. Better docs, less bugs...