These are the notes I made whilst watching the video recording of Paul Meehl’s philosophy of science lectures. This is the sixth episode (a list of all the videos can he found here). Please note that these posts are not designed to replace or be used instead of the actual videos (I highly recommend you watch them). They are to be read alongside to help you understand what was said. I also do not include everything that he said (just the main/most complex points).
A core postulate is one that is found in every derivation chain or a postulate that consists of only core concepts. A core concept is one that is relied on implicitly in every derivation chain is in the hard core.