The touchstone of science is the universal validity of its results for all normally constituted and duly instructed minds.


The Grammar of Science (2nd edition), Chapter I (p. 24)


The touchstone of science is the universal validity of its results for all normally constituted and duly instructed minds.

The touchstone of science is the universal validity of its results for all normally constituted and duly instructed minds.

The touchstone of science is the universal validity of its results for all normally constituted and duly instructed minds.

The touchstone of science is the universal validity of its results for all normally constituted and duly instructed minds.