I have something much longer and comprehensive coming on this topic, but these few notes will have to do for now.
First, “open” is a continuous, not binary, construct. A door can be wide open, completely shut, or open part way. So can a window. So can a faucet. So can your eyes. Our commonsense, every day experience teaches us that “open” is continuous. Anyone who will argue that “open” is a binary construct is forced to admit that a door cracked open one centimeter is just as open as a door standing wide open, because their conception of the term has no nuance. Alternately, they may adopt an artificial definition, in which a door opened 20 cm or more is considered open, while a door opened 19 cm is not considered open. But this is unsatisfactory as well.
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