“Temporal bandwidth” is the width of your present, your now. It is the familiar “Δt” considered as a dependent variable. The more you dwell in the past and in the future, the thicker your bandwidth, the more solid your persona. But the narrower your sense of Now, the more tenuous you are. It may get to where you’re having trouble remembering what you were doing five minutes ago, or even—as Slothrop now—what you’re doing here,”