 Systems of connexive logic have been motivated and arrived at by different considerations. One motivation comes from relevance logic and the idea that semantic consequence is a content relationship, see section 3.1. Moreover, principles of connexive logic have been discussed in conditional logic, see section 3.2 and the entries on  indicative conditionals,  the logic of conditionals, and  counterfactuals,  in different accounts of negation, see section 3.3 and the entry on  negation,  and in approaches to contra-classical logics, see section 3.4. Another motivation emerges from empirical research on the interpretation of negated conditionals in natural language and the aim to adequately model the semantical intuitions revealed by these investigations, see section 3.5.