“A quick note on terminology. Members of the Circle
were logical empiricists, sometimes called logical positivists.
Positivism is the view that our knowledge derives from
the natural world and includes the idea that we can have
positive knowledge of it. The Circle combined this position
with the use of modern logic; the aim was to build a new
philosophy.”
— Edmonds, David. The Murder of Professor Schlick (p. vii).
Princeton University Press. Kindle Edition.
For aficionados of associative logic —
See Triple Cross in this journal and the Fano-plane circle
in the illustration below.