He couldn't tell time until he was in his teens.

Annesley knew this meant that she was not to tell tales, but about what? Did Uncle Walker want his Bush Baptist religion kept a secret?

From September passengers will be able to enter by tapping their credit card at the barriers – with the new Tannoy announcement avoid card clash joining the familiar mind the gap as the sound of the Underground. Card clash can be avoided with an even newer technology, contactless payments via mobile phones: […]

In such cases, scientists often make an ansatz, an educated guess if you like, and then proceed to compute the consequences of the guess.