Cicero was well aware of the problem. In his book On The Orator, he argues that real eloquence can be acquired only if the speaker has attained the highest state of knowledge – “otherwise what he says is just an empty and ridiculous swirl of verbiage”. The true orator is one whose practice of citizenship embodies a civic ideal – whose rhetoric, far from empty, is the deliberate, rational, careful organiser of ideas and argument that propels the state forward safely and wisely. This is clearly what Obama, too, is aiming to embody: his project is to unite rhetoric, thought and action in a new politics that eschews narrow bipartisanship.

He said a healthy, balanced diet was important for reducing the risk of many “old age” diseases, such as cancer, diabetes and osteoporosis, but there was no clear evidence that eating antioxidants could slow or prevent ageing, and even less evidence to support the claims made by antioxidant pills and creams.