An attempt to answer the query: Assuming the existence on another planet of a race of "high psychical development," would that race be able to reason as man does? Digressions on a defense of instinct and on testing, by means of mathematical examples, the reasoning power of superior minds apparently deficient in mathematical aptitude.
Instinct, Logic (modal see Modality), aptitude for Mathematics, Reasoning (probable see also Probability), definition of Science
pp. 1-11, with a rejected p. 9