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  • Many instances might be adduced to illustrate the peculiar liability which one undergoes in dealing with these primitive men who follow out in practice the old fallacy of _post hoc ergo propter hoc_.

    The Manóbos of Mindanáo Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir

  • They may induce him hereafter to study the subject thoroughly in a complete treatise, when he has leisure and opportunity; but, in any case, a boy will leave school all the better prepared for the work of life, whatever that work may be, if he knows the meaning of _induction_, and has been cautioned against the error, _post hoc, ergo propter hoc_.

    How to Write Clearly Rules and Exercises on English Composition

  • Of the errors in reasoning about a cause none is more common than that known by the older logic as _post hoc, ergo propter hoc_ (after this, therefore on account of it), or more briefly, the _post hoc_ fallacy.

    The Making of Arguments

  • This gives rise to what is known in technical logic as the _post hoc ergo propter hoc_ fallacy; that is, the assumption that because one thing happens after another, therefore it happens _because_ of it.

    Human Traits and their Social Significance

  • The child was so and so; it was found on inquiry that the father was also so and so: _Post hoc, ergo propter hoc_ -- it was heredity.

    Applied Eugenics

  • "Not in it exactly, unless you go in for _post hoc, propter hoc_."

    The Best Short Stories of 1917 and the Yearbook of the American Short Story

  • And yet we should be cautious in history of assuming _post hoc propter hoc_.

    The Age of the Reformation

  • Boswell tells us that although the sage himself never smoked, yet he had a high opinion of the practice as a sedative influence; and Hawkins heard him say on one occasion that insanity had grown more frequent since smoking had gone out of fashion, which shows that even Johnson could fall a victim to the _post hoc propter hoc_ fallacy.

    The Social History of Smoking

  • Never was there a clearer case of _post hoc, propter hoc_; but even the officials at the War Office were suspicious in the matter, and their attitude towards Gordon went near to precipitate the very catastrophe they wanted to avoid.

    The Life of Gordon, Volume II

  • Accordingly, not every antecedent of an event is its Cause: to assume that it is so, is the familiar fallacy of arguing '_post hoc ergo propter hoc_.'

    Logic Deductive and Inductive


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