How many of those elements did you include in your triangle, before being prompted by the questions?

I'm not sure you can generally answer that by introspection. At least in my case, when prompted by the question I remember having seen the specific detail. However knowing how the mind works, I also assign high probability to the explanation that my mind filled in the requested detail when prompted - rewriting my memory, loosely speaking. This is, I believe, the same phenomenon that makes eyewitness testimony so unreliable.