The men in the laboratory [...] cannot be said to observe the actual objects of their curiosity at all.[...] The sense data on which the propositions… - Susanne Langer

" "

The men in the laboratory [...] cannot be said to observe the actual objects of their curiosity at all.[...] The sense data on which the propositions of modern science rest are, for the most part, little photographic spots and blurs, or inky curved lines on paper.[...] What is directly observable is only a sign of the "physical fact"; it requires interpretation to yield scientific propositions.