Almost certainly a reference to https://en.wikipedia.org/wiki/Penumbra_(law) https://en.wikipedia.org/wiki/Penumbra_(law) This is probably the single most sign

Almost certainly a reference to https://en.wikipedia.org/wiki/Penumbra_(law) https://en.wikipedia.org/wiki/Penumbra_(law) This is probably the single most significant concept for legal privacy rights in the US.