0 votes 0 votes I am getting b) but right option is a) please check it Mathematical Logic zeal-workbook mathematical-logic first-order-logic zeal + – Prince Sindhiya asked Nov 9, 2018 edited Mar 9, 2019 by ajaysoni1924 Prince Sindhiya 509 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply amitqy commented Nov 9, 2018 reply Follow Share There is no free lunch can be rewritten as "It is false that there is at least 1 free lunch".So a is true. Statement b is the negation of the statement "Every lunch is free".In this negation, there can be some lunch which is not free.But the given statement is "There is no free lunch" 0 votes 0 votes Prince Sindhiya commented Nov 11, 2018 reply Follow Share @ amitqy shouldn'nt this line- there can be some lunch which is not free is - ∃(x)(Lunch(x)$\wedge$$\sim$Free(x)) 0 votes 0 votes amitqy commented Nov 11, 2018 reply Follow Share I understand it as : There exists at least one lunch and it is not free. 1 votes 1 votes Please log in or register to add a comment.