I do not mean to be difficult but what does this mean: > In the case of Tim Ferriss' technique, he's using ideas grounded in > science, but I couldn't find

I do not mean to be difficult but what does this mean: > In the case of Tim Ferriss' technique, he's using ideas grounded in > science, but I couldn't find research beyond Ferriss' own claims on > his blog post. What are "ideas grounded in science" that do not have some body of research/experimental-validation? Am I reading it too literally?