Ideas from 'Essays on Intellectual Powers: Conception' by Thomas Reid [1785], by Theme Structure

[found in 'Inquiry and Essays' by Reid,Thomas (ed/tr Beanblossom /K.Lehrer) [Hackett 1983,0-915145-85-5]].

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10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / b. Conceivable but impossible
Impossibilites are easily conceived in mathematics and geometry
                        Full Idea: Reid pointed out how easily conceivable mathematical and geometric impossibilities are.
                        From: report of Thomas Reid (Essays on Intellectual Powers: Conception [1785], IV.III) by George Molnar - Powers 11.3
                        A reaction: The defence would be that you have to really really conceive them, and the only way the impossible can be conceived is by blurring it at the crucial point, or by claiming to conceive more than you actually can