For in this case we are able, after detecting the antecedent A, to produce it artificially, and by finding that a follows it, verify the result of our induction. But if we cannot artificially produce the phenomenon A, the conclusion that it is the cause of a remains subject to very considerable doubt.
I had brought my most powerful glass with me, and from the commanding elevation upon which I stood, I now carefully swept the entire island as far as the range of my glass permitted, but without detecting the slightest trace of inhabitants.
Arthur was generally indifferent to what he ate or drank, the reaction, perhaps, of the luxury of his home; but having had a present of some peculiar trout from Captain Fitzhugh, and being, as an angler, a connoisseur in fish, many were his exclamations at detecting that those which were served up at breakfast were not the individuals sent.
He, a man of reason, had only known how to ridicule the generous and disinterested enthusiasms of other men, detecting at once their weak points and lack of adaptation to the reality of the moment.... What right had he to laugh at his mate who was a believer, dreaming, with the pure-mindedness of a child, of a free and happy humanity?... Aside from his stupid jeers, what could he oppose to that faith?...
The formal couple are always sticklers for what is rigidly proper, and have a great readiness in detecting hidden impropriety of speech or thought, which by less scrupulous people would be wholly unsuspected.
Nor had that monkey of a Cardailhac stopped at that: detecting Mademoiselle Afchin's liking for the stage, he had succeeded in persuading her that she possessed an intuitive knowledge of all things pertaining to it, and had ended by asking her to cast a glance in her leisure moments, the glance of an expert, upon such pieces as he sent to her.
Prof. G. Brynlants of the Belgian Academy of Sciences, who has made the detecting of forgery and disputed handwriting a study for twenty years, recently made public an account of the researches he had made and deductions arrived at with a view of making known how frauds and alterations are made on checks, drafts, and business paper generally and how same can easily be detected.
And all the time Desmond watched, watched, unobtrusively but unceasingly, looking out for something he was confident of detecting through the suave, immobile mask of this brilliant conversationalist. Skillfully, almost imperceptibly, Desmond edged the talk on to the war. In this domain, too, Mortimer showed himself a man of broad views, of big, comprehensive ideas.
I say the satisfaction, for, to own the truth, I was eager to witness the effect that would be made on the monikin sensibilities, when he came to speak of my own discernment in detecting their real characters beneath the contumely and disgrace in which it had been my good fortune to find them, the promptitude with which I had stepped forward to their relief, and the liberality and courage with which I had furnished the means and encountered the risks that were necessary to restore them to their native land.
It enables the enemy to withdraw his forces deliberately and in perfect order, and to assume another and stronger position comparatively at leisure. The difficulty of detecting the dummies is emphasised, inasmuch as now, whenever the sound of an aeroplane is heard, or a glimpse thereof is obtained, the men keep well down and out of sight. Not a sign of movement is observable.