How dissimilar are "they're not" and "they aren't"?
Is it dependent on context or are these exactly the same?
They are supposed to be going, but they are not.
They are not going.
These are pretty much equivalent. If you desire to place more emphasis on the negative, use "They're not."
Thank you for your interest in this question.
Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.
Would you like to answer one of these unanswered questions instead?