Calling the Not operator twice does nothing: the second invocation undoes the first. Either this is a bug, if the operator was actually meant to be called once, or misleading if done on purpose.

Noncompliant Code Example

Dim b As Boolean = False
Dim c As Boolean = Not Not b 'Noncompliant

Compliant Solution

Dim b As Boolean = False
Dim c As Boolean = b 'Compliant