Prolog doesn't have a conventional programmer oriented introduction. You need to at least include a "Hello World" program like this main :- write('This is a

Prolog doesn't have a conventional programmer oriented introduction. You need to at least include a "Hello World" program like this main :- write('This is a sample Prolog program'), write('\nThis program is written into hello.pl file'). ?- main. ?- halt. Next up, there's the fact that math doesn't use the =, but rather uses is to do evaluations at runtime, which drove me nuts. You have to use foreach or forall to do loops, and there are subtle differences ?- forall(between(0,5,N), (A is 5-N,writeln(A))). 5 4 3 2 1 0 true. It's just not programmer friendly. At least with spreadsheets, you can see what's going on, Prolog is just weird It's hard to pick up users, if they can't get enough of a grasp of it to make sense of it.