Solved
Smart List - info coming from SFDC or marketo database
I created a smart list, and was under the impression that using the filters i put in place, it was pulling the names from SFDC. However, when I looked up one of the leads that was in the smart list, I noticed he was not in SFDC, but he was however, in Marketo. This is confusing me. Do these smart lists pull names from Marketo AND SFDC? How does this work?