Answer:
The logical function NOT reverses the value of a specified argument.
Step-by-step explanation:
Logical functions, like logical operators, evaluate to TRUE or FALSE.
Examples of such functions are NOT, AND, OR and XOR.
NOT: The NOT operator negates or reverses the value of a specified argument. It sometimes has a symbol of (!)
For example, given that variable valid is FALSE, performing the NOT function on the variable valid, i.e NOT(valid), will return TRUE. In other words;
=> if valid = FALSE,
=> ! valid = TRUE.