You know that effect where you tap out a melody in your head and you think it's a lot more obvious to others than it actually is (I forget the ref)? There's a reverse effect where you think a signal is very impoverished but people get it easily.
Conversation
Eg. that old puzzle:
24 H in a D
26 L of the A
7 D of the W
12 S of the Z
52 C in a P (WJs)
13 S in the USF
