Much recent philosophy of science has been dedicated to disclosing that a 'given' or a 'pure' observation language is a myth-eaten fabric of philosophical fiction. ...In any observation statement the cloven hoofprint of theory can readily be detected.

— Norwood Russell Hanson, Time Frames: The Evolution of Punctuated Equilibria (1985)

Quoted by Niles Eldredge in Time Frames (1985), citing Hanson's 1970 work.

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