I was a bit harsh in my response as well
and for that, I apologize. Please read my other post on this thread but disregard the harsh words. Validation is critical to science, even when it comes to computer models. Hell, especially when it comes to computer models. As a software engineer, I know all too well how shoddy much of computer code really is. The battle for quality is never-ending but too many people want to take shortcuts. Climate change could have very serious impacts on humanity, but acting in haste could easily make things worse, not better.