We are in the realm, here, of angels dancing on the head of a pin.

BBC: Global warming: Andrew Pendleton and James Delingpole

Some 900 million of these zinc oxide crystals can fit in a single layer on the head of a pin.

FORBES: The science of small

The amount of ricin that can fit on the head of a pin is said to be enough to kill an adult if properly prepared.

WSJ: 'The perfect poison': Ricin used in 3 recent cases

Figuring out how to evaluate pre-exercised options is to engage in the accounting version of medieval debates over how many angels can dance on the head of a pin.

FORBES: Fact and Comment

There's also an aerial view of the pool at Soho House that helps to answer the question of how many angels you can get on the head of a pin, or at least fashion models cheek by jowl at a scene swimming pool on a sweltering summer day.

WSJ: Open-Air Status Symbols

Whether the sale of gametes diminishes the value of life by putting a price on it and whether the contribution of women to this growing market is adequately compensated are the kinds of questions about which you could set thousands of angels into motion on the head of a pin.

FORBES: Sperm Donors are from Mars, Ova-Sellers from Venus

Mr. WEISBERG: Yes and I think the volatility, basically, is just indicative of the fact that people just simply don't know what to do and so everybody is sort of sitting on the head of a pin, easily pushed one way or the other depending on the headline or rumor.

NPR: Floor Trader Describes Wall Street Gyrations

Let's stop dancing on the head of a pin to someone else's argument about who is more righteous: the woman who opts out to care for children, or the one who leans in to leadership in the corporate world, or the one who dodges both options to create a part-time alternative.

CNN: Why women must seize this moment

Already, there are medieval how-many-angels-can-dance-on-the-head-of-a-pin debates about which method is most appropriate.

FORBES: Fact and Comment