In a CFB
article today, the following came up:
Faced with a question like "What does Inkwell do?" you are allowed to give the full text, give a partial answer, or say nothing (usually "I can't answer that" rather than just a stone silent stare). What you cannot do regarding derived information is bold-faced lie. You can't say that Inkwell Leviathan is a 1/1 flying creature with lifelink.
You'll notice that among the legal options was a partial answer. That means that had David asked, it would have been legal for Gerry to say, "It's a 7/11 with shroud and islandwalk" omitting the key trample ability. This leads to a simple rule regarding derived information: when [in] doubt, ask a judge.
My understanding is this: When given the partial answer above, if followed up with "That's it, right? No other text?", then Gerry would be forced to either decline or state that there was indeed more. Is this correct, or is there another "tricky answer" available at that point?
In essence, I'm trying to find if there's a way to be certain the answer being given is the complete truth, without calling a judge. I'm excluding cases where the answering player declines to answer, since you have no option but to ask a judge. I'm also exluding cases where the answering player is outright lying, since that's obviously a rules violation, and you have no way of knowing at the time.