It was and is possible to hear both tunes, although rarely at the same time.
The growth of knowledge begins in uncertainty, and increases it: it opens more questions than it answers, and is possible only through the institutionalization of doubt.
Noam Chomsky, the influential linguistic theorist, has recently revised his theory of universal grammar, arguing that recursion is the cornerstone of all languages, and is possible because of a uniquely human cognitive ability.
Preventing malnutrition is the vastly preferred solution and is possible through strategies that include improving household feeding practices, increasing access to healthy affordable foods and strengthening health and sanitation services.
More people are using libraries for e-reading, a practice that does not require visiting a library in person, and is possible on many electronic devices, including the Nook and the iPad.
Conditions in CAR were certainly difficult, yet humanitarian work was, and is, possible: not only has MSF kept an international staff presence through the worst of the crisis, it has actually expanded its presence in six of the most vulnerable areas of the country affected by violence.
Adaptation of the model may be appropriate, and is possible in a number of ways.
