computer's sensors are influenced by the real world, but the represent it with a limited, low fidelity version of "what responses they can give" ... like float

computer's sensors are influenced by the real world, but the represent it with a limited, low fidelity version of "what responses they can give" ... like floating point numbers can represent a broad range of values, but only a specific, limited number of exact quantities within that range. It is a limitation that causes no end of trouble until understood.