IMPORTANCE OF LOGICAL NOT IN PHP
33974
How does true/false work in PHP?
147362
Is ternary operator, if-else or logical OR faster in javascript?
96203
How does negation affect the use and understanding of "or" and "and"
10257
Does PHP allow named parameters so that optional arguments can be omitted from function calls?
150084
Use "or" or "nor"?
145656
Weak typing in PHP: why use isset at all?
47279
How to choose a proper contraction "it's not" versus "it isn't"?
10644
Why $¬¬\bot \not\in PROP$?
46568
Should I use "or" or "nor" in the following case?
9879
Using "non-" to prefix a two-word phrase
151917
Difference between "not a", "no" and "not any"
27311
Why use "need not" instead of "do not need to"?
138641
"It isn't" vs. "it's not"
154165
Is there a better way to define more conventional if...then...else notations?
98727
"to not" vs "not to"
78396
Logical Operators, || or OR?
68987
What's the point of the Boolean object?