We see, therefore, both from a priori reasoning, and from observed facts, that it is the Word, Thought, or Desire of the Spirit, that localizes its activity in some definite centre.
"The Law and the Word"
Thomas Troward
On the basis of this linkage data alone we should be obliged to locate lethal 1b at the point at which white itself is situated, namely, 1.1, but on a priori grounds it seems improbable that a lethal mutation has occurred at the same locus as the factor for white eye-color.
"Sex-linked Inheritance in Drosophila"
Thomas Hunt Morgan Calvin B. Bridges
The "Constitution of 1875," under which, with some modifications, France is still governed, is not a single document constructed a priori, like the Constitution of the United States.
"A History of the Third French Republic"
C. H. C. Wright