[1] Ruth Saw attended the County School for Girls in Wallington, Surrey, followed in 1926 by Bedford College, University of London, where she studied under Susan Stebbing.
[2] She accepted a position as lecturer in philosophy at Smith College and remained there for several years.
She then returned to England and was appointed to a Lecturership in Philosophy at Bedford College in 1939 and remained there for the rest of her career.
[3] Saw's philosophical interests began with logic and philosophy of language, particularly on causal induction in Ockham's work.
[4] This moved towards metaphysics, particularly Gottfried Wilhelm Leibniz and Baruch Spinoza on whom she wrote full-length works.