The descriptions for the codes of the ValueSet expansion all have typos except for code "exists". To fix:

1) Delete the word "whether" from all descriptions except "exists"
2) Delete the phrase "at least" from the "!=" description.
3) Change "no answer" to "one answer" for >, <, ">=" and "<="

Changed text:
exists: True if whether an answer exists is equal to the enableWhen answer (which must be a boolean).
=: True if at least one answer has a value that is equal to the enableWhen answer.
!=: True if no answer has a value that is equal to the enableWhen answer.
>: True if at least one answer has a value that is greater than the enableWhen answer.
<: True if at least one answer has a value that is less than the enableWhen answer.
>=: True if at least one answer has a value that is greater or equal to the enableWhen answer.
<=: True if at least one answer has a value that is less or equal to the enableWhen answer.