And so it was when an erudite crop of industry rainmakers gathered atop London's "Gherkin" in midsummer for our London Market Roundtable.
It is often only when you question the seemingly obvious that you realise quite how few things really are self-evident when placed under the harsh microscope of rigorous enquiry.
"What is London for?" was one particular question that arose in the course of debate.
Given the many decades of London market industry experience gathered around the table, one would have thought that such a question would be batted away in the blink of an eye. Yet it wasn't.
In fact, the question of how London should define and project itself on the global stage unleashed a lasting debate that failed to raise anything approaching a consensus.
here or on the image to download the 2011 London Market