In formal semantics, subtrigging is the phenomenon whereby free choice items in episodic sentences require a modifier. For instance, the following sentence is not acceptable in English.[1][2][3][4]
^Aloni, Maria (2007). "Free choice and exhaustification: an account of subtrigging effects". Proceedings of Sinn und Bedeutung. 11.
^Dayal, Veneeta (2009). "A viability constraint on alternatives for free choice". In Fălăuș, Anamaria (ed.). Alternatives in semantics. Palgrave Macmillan. CiteSeerX10.1.1.225.2499.