am·bi·gu·i·ty

/ˌæmbəˈgjuːwəti/ noun, pl -ties

: something that does not have a single clear meaning : something that is ambiguous

[noncount]

You should remove ambiguity [=vagueness] from your essay by adding more details.

moral ambiguity [=lack of certainty about whether something is right or wrong]

[count]

the ambiguities in his answers