"Preliminary drawings or sketches in oil or pastel often have an immediacy and emotional appeal far greater than the final canvas."

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But in the prevalent discussion of classes, there are illegitimate transitions to the notions of a 'nexus' and of a 'proposition'. The appeal to a class to perform the services of a proper entity is exactly analogous to an appeal to an imaginary terrier to kill a real rat. Process and Reality

— Alfred North Whitehead