Hegelians, Young See HEGEL.

Hegesias See CYRENAICS.

Heidegger Martin (1889–1976), German philosopher whose early works contributed to phenomenology...

Heidelberg School See NEO-KANTIANISM.

Heisenberg indeterminacy principle See QUANTUM. MECHANIC.

Heisenberg uncertainty principle See QUANTUM. MECHANIC. Hellenistic philosophy, the philosophical systems of the...

Helmholtz Hermann von (1821–94), German physiologist and physicist known for groundbreaking...

Helvétius Claude Adrien (1715–71), French philosopher prominent in the formative phases...

Hempel Carl G(ustav) (1905–97), eminent philosopher of science associated with the...

Hempel-Oppenheim model See COVERING LAW. MODE.

Henkin semantics See SECOND-ORDER LOGIC.

henotheism allegiance to one supreme deity while conceding existence to others;...

Heraclitus (fl. c.500 B.C.), Greek philosopher. A transition figure between the...

Herbart Johann Friedrich (1776–1841), German philosopher who significantly contributed to psychology...

hereditary property See RELATION.

Hermarchus See EPICUREANISM.

hermeneutic circle See HERMENEUTICS.

hermeneutics the art or theory of interpretation, as well as a...

hermeticism See HERMETISM.

hermetism also hermeticism, a philosophical theology whose basic impulse was the...

Herzen Alexander (1812–70), Russian editor, memoirist, and social philosopher, in exile...

heterological See SET-THEORETIC PARADOXES.

heteronomy See KANT.

heuristics a rule or solution adopted to reduce the complexity of...

Henry of Ghent (c.1217–93), Belgian theologian and philosopher. After serving as a church...

Hentisberi, Hentisberus See HEYTESBURY.

hexis (Greek, from hexo, 'to have', 'to be disposed'), a (good...

hidden variable See PHILOSOPHY OF SCIENCE,. QUANTUM MECHANIC.

hierarchical system See COMPUTER THEORY.

hierarchy a division of mathematical objects into subclasses in accordance with...