- heuristic adj. related to a guiding rule or formula
- semiotics n. study of signs and symbols
- praxis n. putting an idea into practice
- ethology n. branch of zoology that studies animals in their natural habitat
- ontology n. metaphysical study of the nature of being and existence
- epistemology n. the philosophical theory of knowledge
- positivism n. the idea that everything we know comes from our senses
via hifromneptune