Synonyms for «solid logic»

Synonyms for individual words can be found below.

This may seem counterintuitive, but there's solid logic behind this trick. (mindbodygreen.com)
It seems like pretty solid logic: Raising mandatory pension contributions will improve Canadians» economic well being in retirement. (moneysense.ca)
Solid logic Fred. (religion.blogs.cnn.com)
(see all sentences)