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Frederik Wellmann
Printed Article (annotated)
This is the printed article of 1868, "Grounds of Validity of the Laws of Logic," along with the corrections found in the margins of the pages of the article. 5.318-357 is the 1868 article with the corrections of 1893 that is, Essay VI of "A Search for a Method."
Laws of thought (see also Contradiction Excluded Middle Identity), Logic (modal see Modality)
pp. 249-264
1893
MS0593_015
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1893