Tautology. Certainly I had no clue about this word, when my supervisor wrote this on my draft research proposal document. Apart from the many silly grammatical errors (He often says, 'Don't worry, it would take a while to come out of Indian English!'), I had to understand these kind of high-end jargons to understand the corrections in the document.
Ok, when I googled and looked up in wikipedia, it said, tautology means redundant representation with superfluous words. He had marked this when I had written "a brief summary". A summary itself is a brief account, don't you agree?
Mmm.. day by day, we learn!