[tor-talk] Why does parameter "StrictExitNodes" exist?

[Ben Stover]

Assume I specified in "torrc" file

ExitNodes {fr},{de],{ca}

According to Tor docs that means that the exit nodes should always (?) be in one of the three countries.

On the other hand there is another parameter "StrictExitNodes" which forces Tor to use an ExitNode
from one of the three nodes. This is confusing.

Why is "ExitNodes" not sufficient?

Is it only a case of probability?

So with only the ExitNodes statement above it could happen that the exit node is in US anyway?

This is strange.

Maybe someone could help me

Thank you
Ben