This is our current Matching Logic for Contacts for the PX and Salesforce integration

This is because we have users who will access our product via plus-addressing variations of the same email address (danny+test@email.com and danny+admin@email.com are the same as danny@email.com for our purposes).
So we set User base email as a user attribute in the identify call, stripping out the plus addressing.
However, we have some customers on older versions of our product that pre-date this shift to User base email in the identify call, so they are not able to be matched.
My Question
I am able to also select Email for the Salesforce matching logic. Is this an AND or OR matching rule? If I change my logic to this (note: Email is selected), will it match on User base email OR Email?

It’s not clear in the documentation, which only says this:
In addition to this, Gainsight PX allows you to map feature metrics. If you enable and/or Contacts option, select the Email checkbox to map the Gainsight PX user email with the Salesforce Contact email to map.
It does not specify what happens if more than one matching logic item is selected.
