Alla faccia di discoteche, pub, bar......

[fedex]

Welcome to SWI-Prolog (Multi-threaded, Version 5.6.29)
Copyright (c) 1990-2007 University of Amsterdam.
SWI-Prolog comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to redistribute it under certain conditions.
Please visit http://www.swi-prolog.org for details.

For help, use ?- help(Topic). or ?- apropos(Word).

1 ?- cool(saturday, night).

No
2 ?-