 While there have from time to time been attempts to call the Church-Turing thesis into question (for example by László Kalmár in his 1959; Elliot Mendelson replied in his 1963), the summary of the situation that Turing gave in 1948 is no less true today: “it is now agreed amongst logicians that ‘calculable by L.C.M.’ is the correct accurate rendering” of the informal concept of effectiveness.