"I expect we didn't have enough information on the plane to guess that, or we would've guessed."

"...my brain's literary processor is suggesting that the only way the readers of my story could have guessed is if the uniquely applicable information was in a conversation that only I heard, without it being buried under all the information generated all over the airplane.  Which would require that... what have I heard like that which was remotely interesting.  It would need to have something to do with the two physicists seated in the row behind me, who were coming back from a conference on superconductivity."

"I expect we didn't have enough information on the plane to guess that, or we would've guessed."

"...my brain's literary processor is suggesting that the only way the readers of my story could have guessed is if the uniquely applicable information was something only I heard, or singled out by how I heard it without it being buried under all the rest of the information generated all over the airplane.  Which would require that... what have I heard like that which was remotely interesting.  It would need to have something to do with the two physicists seated in the row behind me, who were coming back from a conference on superconductivity."