material_implication Copy: has NO comma Hide Show Full text search for "material_implication" Search BackLinks only Display context of search results Case-sensitive searching 함의,implication . . . . 6 matches Principia_Mathematica . . . . 2 matches 동치,equivalence . . . . 1 match 머티리얼,material . . . . 1 match Found 4 matching pages out of 2018 total pagesShow Context.You can also click here to search title.