To the degree or extent that; used to show a limit on how much something is true.
Compound of 'in' + 'so' + 'far', from Middle English. The phrase literally means 'in such distance' and evolved to mean 'to such a degree.' It appeared as a two-word phrase before becoming standardized as one word by the 17th century.
This word is a verbal hedge—it's how we carefully qualify statements when we're not totally sure about something. Scientists use 'insofar as' constantly in research because it's intellectually honest: it says 'this is true, but only up to this limit.'
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