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A condition can be both necessary and sufficient. For example, at present, "today is the Fourth of July" is a necessary and sufficient condition for "today is Independence Day in the United States". Similarly, a necessary and sufficient condition for invertibility of a matrix M is that M has a nonzero determinant.
Biological tests of necessity and sufficiency refer to experimental methods and techniques that seek to test or provide evidence for specific kinds of causal relationships in biological systems. A necessary cause is one without which it would be impossible for an effect to occur, while a sufficient cause is one whose presence guarantees the ...
Maslow's hierarchy of needs is an idea in psychology proposed by American psychologist Abraham Maslow in his 1943 paper "A Theory of Human Motivation" in the journal Psychological Review. [1] The theory is a classification system intended to reflect the universal needs of society as its base, then proceeding to more acquired emotions. [18]
We explain the commonly circulated concept with some examples of how it translates in the real world. What is Maslow’s hierarchy of needs? We explain the commonly circulated concept with some ...
People also talk about the needs of a community or organisation. Such needs might include demand for a particular type of business, for a certain government program or entity, or for individuals with particular skills. This is an example of metonymy in language and presents with the logical problem of reification. Medical needs.
In 1938, the American psychologist Henry Murray developed a system of needs as part of his theory of personality, which he named personology.Murray argued that everyone had a set of universal basic needs, with individual differences among these needs leading to the uniqueness of personality through varying dispositional tendencies for each need; in other words, a specific need is more ...
Contingency is one of three basic modes alongside necessity and possibility. In modal logic, a contingent statement stands in the modal realm between what is necessary and what is impossible, never crossing into the territory of either status. Contingent and necessary statements form the complete set of possible statements.
Need theory, also known as Three needs theory, [1] proposed by psychologist David McClelland, is a motivational model that attempts to explain how the needs for achievement, affiliation, and power affect the actions of people from a managerial context.