Intelligence noise is made of competing true signals, not random static
Roberta Wohlstetter's 1962 study of Pearl Harbor refused the comfortable reading that warnings were missed. The warnings were there: Magic decrypts of Japanese cable traffic, the recall of Japanese merchant shipping, the November 27 war-warning, the disappearance of the carrier fleet from radio nets. Washington had them. Washington also had a different set of warnings, equally credible, pointing at the Philippines, the Kra Isthmus, Panama, sabotage on the West Coast, and a Japanese move north against the Soviet Far East. Every desk was full of signals. None sat in silence.
Her contribution was naming what "noise" actually consists of. It is not random static drowning a clear tone. It is other true signals, generated by the same adversary, pointing in incompatible directions, and indistinguishable in advance from the one that matters. The dots are all equally bright; the constellation only resolves after the event.
"After the event, of course, a signal is always crystal clear; we can now see what disaster it was signaling, since the disaster has occurred. But before the event it is obscure and pregnant with conflicting meanings."
This kills the post-9/11 "connect the dots" framing. That framing assumes the failure was attentional: analysts had the right pieces and didn't draw the line. Wohlstetter's argument is structural. The line cannot be drawn in advance, because a hundred other lines are equally available and equally supported. Hindsight does not just clarify the signal. It deletes the noise around it.
Source claim: What gets called noise in intelligence is not absence of information but the simultaneous presence of competing true signals, only one of which the event will retrospectively validate.