A member who chooses not to post suggested to me the word "perissology". To my dismay,
I discovered that it had appeared in an early issue of AWAD. Incidentally, the member who
introduced it was so talented that it is a pity he did not stay with us.
But the word seems well worth recycling, since I think few members are likely to recall it.
It is a synonym for tautology.

http://www.wordsmith.org/awad/awadmail6.html

I'd say it was closer to a pleonasm (have said, actually :) than a tautology.

I agree.