In a word: No. but he left some wiggle room.
...As explained more fully below, the statute’s anguage, on its face, requires that others be present before the obligation to signal arises. I recognize, however, that one might argue that the statute is ambiguous about whether motorists must signal only when others are present. To the extent there is any ambiguity, the statute’s historical development—which is explained in the opinion—clearly indicates that the legislature intended motorists to signal only when others are present.
You have been warned about all the blockheads who'll claim they didn't see you when they failed to indicate a turn.