I managed to reproduce it:
Ask Arelene about ethan (2.) and lsitne everything she has to say about him
Talk to Ethan, ask if its him (1.)
Introduce yourself and ask about temporal manipulation (4.)
Ask about temporal manipulation (1.)
Ask why its underused (1.)
Make any guess (x.)
Ask if he will finally teach you (3.)
This will let you teach psi without taking the pill. Its one time thing and you cant access it again after.