“For this is most shameful (and often brought up against us as a reproach), to deal in the words, and not the actual work, of philosophy.”
hoc enim turpissimum est, quod nobis obici solet, verba nos philosophiae, non opera tractare.
Seneca, Epistles to Lucilius 3.3 (24)
Perhaps a similar insight from Richard Feynman:
http://bigthink.com/neurobonkers/how-to-use-the-feynman-technique-to-identify-pseudoscience