How does Appian determine which Task to show after an AND Node?

Question

I have a process with a task for a user that leads to an AND node. Each flow off the AND node has another task. All tasks are assigned to the same user and every flow line is chained. 
 How does Appian determine which task after the AND node to show to the user?

Colton Beck · Accepted Answer

Do they need to be chained? Instead you could have the two tasks assigned normally and the user can then choose from them independently in the Task list. 
 
Or possibly have the one that the business prefers completed first chained and the other one not chained.

Carlos Santander · Answer

You can activity chain to both tasks. Given that the preferred task isn't always created, you could have an XOR gateway before the non-preferred task so that, if the preferred task is created, then activity chaining is broken.