Avram, thanks for the Moscow diamond story.
Note the differences between my examples and yours: my were about learning from what a Rav did and often with an explanation. This is straight halakhic reasoning. Of course, it may be possible to argue that the story is not true, or that there are other opinions, or other circumstances. Yours is a story that something happened. ext, you’ll tell me that bat kol confirmed your position?!
The story is interesting, I can’t resist asking kashios: how did Bolshevik coup in Petersburg happen in Moscow, and why did some Bolsheviks went after Jews on that day instead of going after the Provisional government as they were supposed to? Maybe someone paid some diamonds to get out after Bolshevik revolution and needed a story to explain how he escaped.