In the "Why's poignant guide to Ruby" book, it states the following:

"If you can't get to an object through a variable, then Ruby will figure
you are done with it and will get rid of it. Periodically, Ruby sends
out its garbage collector to set these objects free."

The point I'm not getting here is: "If you can't get to an object
through a variable..."

Can you provide an examples that illustrates this?

Thanks.
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