Bool's Ai.

Entia non sunt multiplicanda praeter necessitatem.
which is Latin and it means
No more things should be presumed to exist than are absolutely necessary.
Which means that a murder victim is usually killed by someone known to them and fairies are made out of paper and you can't talk to someone who is dead.
-The Curious Incident Of The Dog In The Night Time.
Mark Haddon.
Oh, how I love this book!