People whose professional activity lies in the field of politics are not, on the whole, conspicuous for their respect for factual accuracy. Politicians seldom lie.

Failure to assimilate an adequate quantity of solid food over an extended period of time is absolutely certain to lead, in due course, to a fatal conclusion. Lack of food causes death.

The climatic conditions prevailing in the British Isles show a pattern of alternating and unpredictable periods of dry and wet weather, accompanied by a similarly irregular cycle of temperature changes. British weather is changeable.

It is undeniable that the large majority of non-native learners of English experience a number of problems in attempting to master the phonetic patterns of the language. It cannot be denied that many non-native learners of English experience a lot of problems in attempting to master the phonetic patterns of the language.