"Solid evidence" refers to strong and reliable proof or information that supports a claim or statement and leaves little doubt or uncertainty. Full definition
That's not a knock because her suggestions are based on decades of solid evidence of what works for children. (jonathanpelto.com)
The work history section of your resume is the chance you have to provide solid evidence of the skills and other things you have talked about thus far. (livecareer.com)
So it is important to use careful wording so as not to confuse association and causation, but not so important to recommend dietary changes that are based on solid evidence of causation? (westonaprice.org)