I write about all this now to refocus attention on the substance of the interviews, which has been overshadowed by Mr. Pompeo’s subsequently swearing at me, calling me a liar and challenging me to find Ukraine on an unmarked map.

For the record, I did. That’s not the point. The point is that recently the risk of miscalculation — of two old adversaries misreading each other and accidentally escalating into armed confrontation — has felt very real. It occurs to me that swapping insults through interviews with journalists such as me might, terrifyingly, be as close as the top diplomats of the United States and Iran came to communicating this month.