How can I use user attributes in a conditional node?

How can I check if I have the users email (or any other user attribute), and then follow a different path?

Default behaviour appears to be, if I have users email, ignore capture email node.

What if I want to check if I already have the email, then say, I have your email as this, is that still correct? and when the user says no, clear the email so the capture email node is not ignored?