[paolomaffei]

a Buddhist would say that just in the same way that a rock evolves into a human, a human evolves into a Buddha.

[ZenoArrow]

In the sense that a rock remains a rock, and a human remains a human.

Does the direct answer gets someone to the truth just as easily as speaking in riddles?

[contingencies]

I believe only Chinese Chan (which evolved in to Japanese Zen, and similar Korean and Vietnamese traditions) uses the dramatic "mental conundrum provides sudden enlightenment" approach. The rest of Buddhism apparently generally considers needlessly verbose or obtuse speech to be unskilled and counter to progress. Indeed, it could be argued that speech - with some exceptions - is generally discouraged.