Mail rule options ...

Hi,

In Mail, I have a rule for an intelligent mailbox that selects all email that are older than 365 days and that are in the Trash.

For this rule to work, why do I have to also check the option below the rule definition that ask to include messages that are in the Trash (see picture below) ? Since the rule specifies that the message have to be in the Trash, why do I have to also check that option ?

Can comeone help me with this one ?

Regards.

Robert Lespérance