Sustainability is no longer an option—it's a business imperative for long-term survival.

The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.

Time crumbles things, everything grows old under the power of Time and is forgotten through the lapse of Time.

The deepest problems of modern life derive from the claim of the individual to preserve the autonomy and individuality of his existence in the face of overwhelming social forces, of historical heritage, of external culture, and of the technique of life.