> is that I have no right to talk about bits, before defining physical representation of these bits I'm saying something slightly different: You can talk abou

> is that I have no right to talk about bits, before defining physical representation of these bits I'm saying something slightly different: You can talk about bits in a system without a physical representation; That system can have an information-entropy associated with it. Once you implement a physical system representing those bits, then Landauer's comment applies.