Who would choose Beta? Very few Beta's, but mostly Alpha's. Alpha, I think, is the right answer here but why?

好,谁会选β,很少有选β的,基本都选的是α,α应该是正确答案

耶鲁公开课 - 博弈论课程节选

It's the safer answer if you can't decide whether or not your opponent's going to choose Left or Right, so you don't have to worry about having a payoff of 0.

当你无法判断你的对手会选左还是右时,选下是较安全的答案,因此你不必担心收益变成0

耶鲁公开课 - 博弈论课程节选