Full Idea
Typically, full explanations are not arguments, but singular sentences, or conjunctions thereof.
Gist of Idea
Most explanations are just sentences, not arguments
Source
David-Hillel Ruben (Explaining Explanation [1990], Ch 6)
Book Reference
Ruben,David-Hillel: 'Explaining Explanation' [Routledge 1990], p.197
A Reaction
This is mainly objecting to the claim that explanations are deductions from laws and facts. I agree with Ruben. Explanations are just information, I think. Of course, Aristotle's demonstrations are arguments.