That's nonsense a clear case of people being wise after the event.

I mean, I got wise to it after a while.

Oh, it was easy to be wise after the event.

Well, I suppose we should have thought of it, but it's so easy to be wise after the event.

But it is easy to be wise after the event.

They were supposed to have no feeling for the country, and to be wise only after the event.

And she was practically wise too, after the manner of experienced women.

He always disliked people who were wise after the event.

"Yes, it is easy to be wise after the fact."

As regards the first question, I would suggest that it is easy to be wise after the event.