Question

`{α_1,α_2,...,α_n}` is a set only if all the `α_i`s follow a given rule. This statement is true/false? Please give reasons for your answer ?

Answer 1

True

Explanation:

`S = {alpha_1, alpha_2, ..., alpha_n}` is a set.

It is definable via a rule:

`alpha in S " " <=> " " alpha = alpha_1 vv alpha = alpha_2 vv ... vv alpha = alpha_n`