[VadeRetro]

You can't have a mousetrap that lacks a spring.

Many animal traps use a gravity-powered door. A spring can be used for other things, and there are other ways to catch a mouse.

[Ahban]

My favorite crumedgeon-opponent! How are you guy? I hope your organs are not still making your life a burden? Just live another ten years, and we will get a fix for just about anything- except hard headedness!

All your point in the last post are true, but not terribly relevant to the discussion. A mousetrap that is NOT IC can be imagined, but that is not what we have meant by "mousetrap" on this thread. I use the term according to standard useage for a specific mousetrap type, not a guy standing over a mousehole with a large cinder block or any other abstraction!