SWI-Prolog Easter Eggs

pic Hitchhiker's Guide to the Galaxy Referance - 7.2/10 with 4 votes
Simply type this at the prompt:

Trace.

(make sure you use a capital T)

And a referance for Hitchhiker's Guide to the Galaxy will appear.

Enjoy!

This is the result you should see:

?- Trace.
% ... 1,000,000 ............ 10,000,000 years... more

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