We see that a vast net of family likenesses connects the cases in which
the expressions of possibility, “can”, “to be
able to”, etc. are used.
Certain characteristic features, we may say, appear in these cases in
different combinations: there is, e.g., the
element of conjecture (that something will behave
64.
in a certain way in the
future); the description of the state of something (as a condition
for its behaving in a certain way in the future); the account of
certain tests someone or something has passed. ‒ ‒