If something doesn't happen.

If a person doesn't do something that you expected them to do.

If this thing is a thing they should often do.

The probable reason for them not doing it, becasue they normally don't do it.

Yet, when you ask them, they will confabulate.

They will give you logically sounding, decision based reasons,

...for not doing it.

But really, they don't know themselves, that the main reason they are not doing it, because they, themselves, do not normally do that, in that situation.

They have to become the person who does that, in that situation, for them to do that, in the future.

And they won't become that person, until they practice that, in that situation.