capitalization - Shall we capitalize the word after colon?

Shall we capitalize the word after colon?

For example:

The question is: S/shall we capitalize "s" in "shall"?

Another example, https://stats.stackexchange.com/q/91024/1005

For example:

• E/every marginal distribution of a multivariate normal distribution must be a univariate normal distribution.


• S/so it is for the multinomial distribution (which is the multivariate generalization of binomial distribution).


• S/so it is for Dirichlet distribution (which is the multivariate generalization of beta distribution)


• N/not sure for multivariate t distribution.

(In other words, should each of those individual bullets be capitalized, or not?)