What is the truth that you deny?

I have heard that there is a Tibetan word that roughly translates to "The truth that we deny" and sounded close to the English word "gotcha." I however cannot locate this word or a source of it. Can anyone provide a source? It is possible that it translates to either "The truth that I deny" or "The truth that you deny." I am not sure if "we" was the right pronoun. I think it might have been used in debates within the monasteries.