mistaken idea

See: fallacy
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References in classic literature ?
I know he has forgiven me because in some mistaken idea I have done things that prevent him say goodbye as he ought, and he may think that in some more mistaken idea this woman was buried alive, and that in most mistake of all we have killed her.
It was then that I understood the careful trimming of the trees which had led me to form the mistaken idea when first I opened my eyes upon the grove that it was the playground of a civilized people.
And my mother favoured the company with a particular account of that lady's mistaken ideas and conduct regarding the matter in hand, concluding with, 'Now, don't you think it is wrong?
But we may form very mistaken ideas on this subject, if we do not call to mind in our calculations, that the extent of revenue drawn from foreign commerce must vary with the variations, both in the extent and the kind of imports; and that these variations do not correspond with the progress of population, which must be the general measure of the public wants.
I think, Ruby," she began hesitatingly -- for it was difficult for Anne to speak to any one of the deepest thoughts of her heart, or the new ideas that had vaguely begun to shape themselves in her mind, concerning the great mysteries of life here and hereafter, superseding her old childish conceptions, and it was hardest of all to speak of them to such as Ruby Gillis -- "I think, perhaps, we have very mistaken ideas about heaven -- what it is and what it holds for us.
Moreover, in order to understand any man one must be deliberate and careful to avoid forming prejudices and mistaken ideas, which are very difficult to correct and get over afterwards.
There is often the mistaken idea that the police or emergency responders clean up the site of this kind of event of blood and gore.
At the beginning, many people had the mistaken idea that AUDK would be an investment project whose main objective would be to turn a profit.
He was obsessed with the mistaken idea that she was seeing someone else, said a judge.
All these and other tactics result from a mistaken idea of the general public that science, be it Physics, Astronomy, Paleontology, Archeology, etc.
It is the mistaken idea that large improvements in public health result primarily from new medicines.