Between two of these ideas a sagacious and penetrating mind will discern, as it were intuitively, an unobvious link of connexion, upon which, though perhaps unable to give a logical account of it, he will found a perfectly valid argument, which his critic, not having so keen an insight into the Things, will mistake for a fallacy turning on the double meaning of a term.
"A System Of Logic, Ratiocinative And Inductive (Vol. 1 of 2)"
John Stuart Mill
But here I must take notice, that of all the Metalls, there is not any which doth so easily and constantly disclose its unobvious colour as Copper doth.
"Experiments and Considerations Touching Colours (1664)"
Robert Boyle
Whether the somewhat rugged Roman, with his inattention to small matters and to the unobvious, saw the mysticity of the early Christian service and the early Christian basilica, may be doubted; but though it is certain he had not set himself to create this mysticity it is equally certain that he could not banish it from his churches.
"Rome"
Mildred Anna Rosalie Tuker Hope Malleson