At its simplest (sometimes called synonymia simplex), it takes the form of synonymous words arranged in doublets, […] .

Changing his plaid housepants because he didn't shake well enough after pissing and had dribbled on them and they now smelled like piss.

A second worry is that any naturalistic form of a priori justification would have to be psychologistic and, therefore, that it would fail to establish the objectivity of a target claim.

But regardless of which explanation is correct, or even if some other explanation is needed, the voorwerp is fascinating. Suppose, for instance, that it really is a quasar mirror. As we've seen, this means that the voorwerp is a huge collection of mirrors, echoing the light of the quasar at many different times over the quasar's lifetime. That means light from the voorwerp is a bit like a biography of the quasar, […] There's even a voorwerp project, and the Zooites have successfully hunted down several more voorwerps. In all, Galaxy Zoo has been used to write 22 scientific papers, on a wide variety of topics, and many more papers are on the way.