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practice
Conscious human activity aimed at transforming the natural or social world, often contrasted with theory
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to be
to be; to correspond to; connects a subject to its identification, characterization, or identity
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to test
to test; to inspect; to examine; to check; to verify
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truth
the fundamental truth; a principle that reflects the reality of things
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[possessive/attributive]
Connects a describing word or phrase to the noun it describes; also used to indicate a possessive relationship.
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only
only; sole; unique; the one and only
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standard
standard; criterion; norm used as a basis for comparison or judgment