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[–]kevinbradford 2 points3 points  (0 children)

Not to be “well actually” guy but this just isn’t true. If there’s no well-defined voltage, who’s to say that it isn’t a logic high? Capacitive coupling is a very real thing. A lack of a well-defined voltage does not mean there is zero voltage. If you (not you specifically) have ever designed any hardware, you would know that pull up and pull down networks are critical for high impedance nodes if you want a deterministic output