An anankastic conditional is a grammatical construction of the form where Y is required in order to get X.
For example: Not all conditionals of this form have an anankastic interpretation: where thinking about something else is not required in order to eat chocolate, but is rather advice on how to avoid eating chocolate.
[2] The term comes from the Greek ἀναγκαστικός "compulsory", from ἀνάγκη "necessity.
"[citation needed] Anankastic conditionals have been argued to pose problems for compositional semantics.
[3] Other semanticists have argued that anankastic conditionals can be interpreted the same way as "regular, hypothetical, indicative conditionals".