0 votes 0 votes How is B a tautology? Mathematical Logic made-easy-test-series propositional-logic + – palashbehra5 asked Jan 14, 2022 palashbehra5 482 views answer comment Share Follow See all 11 Comments See all 11 11 Comments reply AniketThomas commented Jan 14, 2022 reply Follow Share B is not tautology, It fails for A = 1 and C = 0, Answer is wrong 0 votes 0 votes raja11sep commented Jan 14, 2022 reply Follow Share B is not a tautology. Put a=T and c=F or a=F and c=T . You will get result as false. Hence not a tautology. 0 votes 0 votes palashbehra5 commented Jan 14, 2022 i edited by palashbehra5 Jan 14, 2022 reply Follow Share Yep, that's what I thought. I tried making sense out of their explanation but couldn't make any progress.While we are at it, can you take a look at https://gateoverflow.in/369745/Register-allocation-made-easy-full-syllabus-test as well, thanks? 0 votes 0 votes Zack Fair commented Jan 14, 2022 reply Follow Share It is a typo what they meant is $a\leftrightarrow a$ is tautology 0 votes 0 votes raja11sep commented Jan 14, 2022 reply Follow Share yes.😅 0 votes 0 votes palashbehra5 commented Jan 14, 2022 reply Follow Share Zack Fair Guess what, they have the same typo in their video solution as well, LOL!. 0 votes 0 votes raja11sep commented Jan 14, 2022 reply Follow Share I have seen 2-3 question where both question as well as videos solution wrong. 2 questions on group theory and one question on control flow graph.(ME test) 0 votes 0 votes palashbehra5 commented Jan 14, 2022 reply Follow Share > 2 questions on group theory Was it the one where they considered 87 as a prime number? xD 0 votes 0 votes Zack Fair commented Jan 14, 2022 reply Follow Share Guess what, they have the same typo in their video solution as well, LOL! Whoa!! 🤣 0 votes 0 votes raja11sep commented Jan 14, 2022 reply Follow Share @palashbehra5 Ohh not counted that..then more than 3. 😂 0 votes 0 votes raja11sep commented Jan 15, 2022 reply Follow Share Gateoverflow Test series - GATE Overflow @Zack Fair @palashbehra5 please ans this one if possible 0 votes 0 votes Please log in or register to add a comment.