Quote: consider Neptune before it was ever seen; its description was an a priori truth but not a necessary one

Quotation Skeleton

An even better case of determining the reference … Neptune was hypothesized as the planet which caused … name 'Neptune' to the planet before it was … At that time he was unable to see … the statements 'Neptune exists' and 'some one planet … and also such statements as 'if such and … a priori truths. Nevertheless, they were not necessary … have believed that if Neptune had been knocked … some other object might have caused the perturbations …   Google-1   Google-2

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