[Professor S]

*Spoilers, but honestly at this point, if you don't know already you have to expect them*























Andrew Ryan doesn't mind-control you into killing him. Fontaine is the one who implanted the suggestion in you, and asked "will you kindly" kill Ryan. The reason Rapture is in such a state is due to a civil war brought on by Fontaine and his inluence over the mentally damaged populace addicted to splicing. He wanted Ryan dead, and Ryan wanted Fontaine dead and you'e in the middle of it all.

Andrew Ryan was asking you/the protagonist to overcome the mind control by repeatedly stating "A slave obeys, a man chooses!" Ryan's belief in the individual was so great he believed you would overcome Fontaine's unconscious suggestion, and he was willing to give his life for his principles.





















End spoilers.