The word "never" can be true.
It is appropriate to use it, truthfully, when asked, "Did you ever...?"
However, when the appropriate response is, "I did not...", the word "never" is to be considered Unreliable.
Deceptive people use "never" when "did not" should be used. The word "never" allows the deceptive subject to, psychologically, move into a vague, nondescript period of time, almost as if to 'hide' behind the indeterminate period of time.
Statement Analysis of Roger Clemens, over the years, has shown him to be deceptive.
Here is a portion of his lengthy testimony: