She hates never knowing when a real estate agent might call wanting to bring a prospective buyer to see the house.

NPR: Subprime Crisis Makes It Maddening to Sell a House

In the past, Moretti, a veteran of three other entrepreneurial ventures, would raise one large venture round, never knowing when hed need capital.

FORBES: Going Into Hock

In the classic tradition of never knowing when too much was just that, the Maserati brothers always had a slight problem with racing: They were addicted to it.

FORBES: Vehicles Feature

Including the songs, l'll Never Fall In Love Again, and Knowing When to Leave, the original cast recording was nominated for a Tony Award and won a Grammy in 1969.

BBC: Hal David, US songwriter, dies at 91

When a former Duke of Westminster was accused of not knowing how people lived, because he had never been on a bus, he immediately got on one to prove the accusation wrong.

WSJ: Theodore Dalrymple on the Secret Appeal of Downton Abbey