May or May not

I was bumping my head with a technical training yesterday and I found a hint, that is supposed to help me wade through materials that were for practical purposes Greek and Latin.

"Hint: The datasheet may or may not be useful to you"

Now I was thinking,

"What the hell is that supposed to mean? That is always going be the case right? If there is a datasheet, no matter what you are trying to figure out, the datasheet is going to have only two roles to play!

1) It may be useful to you!

2) It may not be useful to you!

Besides, isn't it enough if it is just "Hint: The datasheet may be useful to you"? Doesn't the word "may" add enough uncertainity? Why go for the "may or may not" overkill? Just so you confuse the reader to the maximum now that you have started of with it anyway?!

Whoever wrote it must have been thinking, "If I wrote just "may"... oops I have just given too much away with the hint!. Buuuuuuuuut if I had just used "may not", I would have turned the user away from the datasheet and that robs me an opportunity to play with his mind. So, I will say "MAY OR MAY NOT!" How delicious. Now that is going to put a spin on his head! Haa Haa Haa"

Now, if I ever meet Mr. May O'Maynot, I would say "I may or may not throw a rock or lathe on your head or toe while you may or may not be sleeping or awake! How about that!"