Probability is expectation founded upon partial knowledge. A perfect acquaintance with all the circumstances affecting the occurrence of an event would change expectation into certainty, and leave nether room nor demand for a theory of probabilities.
George BooleIt is not of the essence of mathematics to be conversant with the ideas of number and quantity.
George BooleTo unfold the secret laws and relations of those high faculties of thought by which all beyond the merely perceptive knowledge of the world and of ourselves is attained or matured, is a object which does not stand in need of commendation to a rational mind.
George BooleThat language is an instrument of human reason, and not merely a medium for the expression of thought, is a truth generally admitted.
George Boole