I consider reasons for questioning 'the laws of logic' (identity, non-contradiction, excluded middle, and negation), and suggest that these laws do not accord with everyday reality. Either they are ...

The main goal of quantum logic is the bottom-up reconstruction of quantum mechanics in Hilbert space. Here we discuss the question whether quantum logic is an empirical structure or a priori valid.

TimesMachine is an exclusive benefit for home delivery and digital subscribers. About the Archive This is a digitized version of an article from The Times’s print archive, before the start of online ...

It was a good week for physics as a team at the University of New South Wales found hints that one of the cosmological constants is not so constant after all—suggesting that the laws of nature are ...