“We cannot point to a single definitive solution of any one of the problems that confront us — political, economic, social or moral, that is, having to do with the conduct of life. We are still beginners, and for that reason may hope to improve. To deride the hope of progress is the ultimate fatuity, the last word in poverty of spirit and meanness of mind. There is no need to be dismayed by the fact that we cannot yet envisage a definitive solution of our problems, a resting-place beyond which we need not try to go.”
1960s, Presidential Address, 1969
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Peter Medawar 40
scientist 1915–1987Related quotes

http://kremlin.ru/eng/speeches/2007/02/01/1309_type82915_117609.shtml
2006- 2010

Source: Analysis Patterns: Reusable Object Models, 1997, p. 6
Language Education in a Knowledge Context (1980)
Context: Definitions, like questions and metaphors, are instruments for thinking. Their authority rests entirely on their usefulness, not their correctness. We use definitions in order to delineate problems we wish to investigate, or to further interests we wish to promote. In other words, we invent definitions and discard them as suits our purposes. And yet, one gets the impression that... God has provided us with definitions from which we depart at the risk of losing our immortal souls. This is the belief that I have elsewhere called "definition tyranny," which may be defined... as the process of accepting without criticism someone else's definition of a word or a problem or a situation. I can think of no better method of freeing students from this obstruction of the mind than to provide them with alternative definitions of every concept and term with which they must deal in a subject. Whether it be "molecule," "fact," "law," "art," "wealth," "gene," or whatever, it is essential that students understand that definitions are hypotheses, and that embedded in them is a particular philosophical, sociological, or epistemological point of view.

Environmentalism as a Religion (2003)

Source: Karen Ilse Horn (ed.) Roads to Wisdom, Conversations With Ten Nobel Laureates in Economics (2009)