[dump100]

with 100s millions of user, each question will become a common question.

[jsprogrammer]

Questions like: what, why, when, how? They are very common, but don't have definite answers.

The problem is, even with 100s of millions (or even billions), there are still an infinite number of questions that can be asked. Each of those questions can't be common.

[morganK]

Classic Pareto setup (https://en.wikipedia.org/wiki/Pareto_principle)