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Under the classical theory of concepts, how human minds represent a category X, gives rise to a set of individually necessary conditions that define X. Together, these individually necessary conditions are sufficient to be X. [10] This contrasts with the probabilistic theory of concepts which states that no defining feature is necessary or ...
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 ...
The commonly employed system S5 simply makes all modal truths necessary. For example, if p is possible, then it is "necessary" that p is possible. Also, if p is necessary, then it is necessary that p is necessary. Other systems of modal logic have been formulated, in part because S5 does not describe every kind of modality of interest.
Necessary condition analysis follows a step-by-step approach to identify necessary conditions. The key steps involved in conducting NCA are as follows: Formulation of a necessity hypothesis: The first step in NCA is to clearly define the theoretical expectation specifying the condition(s) that may be necessary for the outcome of interest.
A needs assessment is a systematic process for determining and addressing needs, or "gaps", between current conditions, and desired conditions, or "wants". [1]Needs assessments can help improve policy or program decisions, individuals, education, training, organizations, communities, or products.
Maslow proposed his hierarchy of needs 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]
System structure diagrams – another way to express the structure of a qualitative dynamic system Stock and flow diagrams - a way to quantify the structure of a dynamic system These methods allow showing a mental model of a dynamic system, as an explicit, written model about a certain system based on internal beliefs.
Metaphysical necessity is contrasted with other types of necessity. For example, the philosophers of religion John Hick [2] and William L. Rowe [3] distinguished the following three: factual necessity (existential necessity): a factually necessary being is not causally dependent on any other being, while any other being is causally dependent on it.