query: Why isn't this valid?
positive_passages.docid: 17452
positive_passages.text: Is differentiating on both sides of an equation allowed?
negative_passages.docid: 136577
negative_passages.text: In formal logic, how is it possible for an argument with a contradictory conclusion to be valid?
negative_passages.docid: 22193
negative_passages.text: Why, logically, is proof by contradiction valid?
negative_passages.docid: 139670
negative_passages.text: Why won't this command work?
negative_passages.docid: 121354
negative_passages.text: is URL valid or not
negative_passages.docid: 134122
negative_passages.text: When is differentiating an equation valid?
negative_passages.docid: 111520
negative_passages.text: Why is 08 not a valid integer literal in Java?
negative_passages.docid: 62633
negative_passages.text: Why doesn't a+++++b work?
negative_passages.docid: 122245
negative_passages.text: Why doesn't this invalid subquery raise a syntax error?
negative_passages.docid: 35370
negative_passages.text: Why is this proposition provable and its converse not?
negative_passages.docid: 94686
negative_passages.text: A bug I can't seem to spot, faulty logic?
negative_passages.docid: 143531
negative_passages.text: False positive? I get this error but cannot find any reason: "Your post appears to contain code that is not properly formatted as code."
negative_passages.docid: 72136
negative_passages.text: Why is my use of the ?: conditional operator incorrect?
negative_passages.docid: 91035
negative_passages.text: Why is x++-+-++x legal but x+++-+++x isn't?
negative_passages.docid: 78009
negative_passages.text: Why can't we use implication for the existential quantifier?
negative_passages.docid: 55487
negative_passages.text: Can someone help what is incorrect in this program?
negative_passages.docid: 56522
negative_passages.text: Why can't I use this code to overwrite a string?