Newbie antonym question

Hello, everyone-
I have spent the day seeking a one word antonym for the noun " choice." The paradigm of "choice" I have in mind is binary, forced choice such as that faced by the protaganist in "Sophie's Choice." I'm thinking about a situation where there is only one action to take; no other actions ( or inactions) are possible. Another example would be that of a condemned man "choosing'" to walk to his execution chamber.
I am engaged with a group of people whose collective psychological need expresses itself as an unshakeable conviction that in fact, Sophie made a "choice," when common sense and context clearly demonstrate that she had no freedom to "choose." The word "choice" seems to me to be completely inappropriate, since the conditions for choice ( ie, freedom and viable alternatives) are missing from the context. This crowd ramapages on with an extreme view of personal responsibiity which asserts that eveything everything in life is a "choice'" and there is nothing else. An extreme example of this would be the assertion that the people who died on 911 were not victims since they chose to go to work in the Twn Towers that day.

Any input appreciated. Am I posting to the correct group or would this question be more appropriate on one of the psych grops?
Thank you