intransitive and secondarily transitive.

:(3a) John (S) tripped.

:(3b) Mary (A) tripped John (O).

Other examples of this type include explode, melt, dissolve, walk, and march. It is this type of ambitransitive verb that is considered a causative. This is given some anecdotal evidence in that to translate (3b) above into languages with morphological causatives, a morpheme would need to be attached to the verb.

Lexical causatives are apparently constrained to involving only one agentive argument. Semantically,

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