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Every table can be a chair. Every chair can be a table. It just depends on your perspective! I have used chairs as tables while sitting on the floor more than I care to admit.

And floor is a big table, very convenient!

Instructions unclear: dug a ditch to sit in, so the floor could be used as the largest table I can fathom.

This has the propensity to become Zeno's paradox, except, instead of motion being impossible, the notion that every surface can simultaneously be chair and table, or table and chair.

I am an avid practisioner of this philosophy.