The prostration for forgetfulness for the follower if the imam does not prostrate

The questioner:
He says: Honorable Shaykh, may Allah grant you success, among the cases where the prostration for forgetfulness becomes obligatory for the follower is when he sees that the prostration is obligatory but the imam did not see it.

The Shaykh:
Yes.

The questioner:
The question is: Isn't the default that the follower follows his imam and does not differ from him, as it is reported from some of the Salaf that disagreement is a condition?

The Shaykh:
Or is this a difference of opinion? This is acting on evidence. You see that the prostration for forgetfulness is obligatory based on evidence. It is not obligatory without evidence. If you have evidence, then you act on the evidence, even if the imam left it out. Yes. For example, the imam washes his hands during the prayer. He sees that placing the hands is not a recommended practice. Placing the hands in prayer is a recommended practice established in authentic hadith. So you place your hands. No, you place your hands. This is your action. Yes.