51.   Much of the work of later philosophers also exists in partial form only.

52.   Much of this evidence exists in the myths.

53.   No matter how democratic the society, they will always exist in some form.

54.   No similar evidence exists in the past for the use of so-called brain science for benign purposes.

55.   None of those options would exist in the adult prison system, and he would be particularly vulnerable to brutalisation.

56.   Or again, take the multitudinous array of chemical substances that exist in the natural world.

57.   Pegged exchange rates are not viable when significant differences exist in national inflation rates.

58.   Racial segregation in schools still exists in some southern states.

59.   Regional planning guidance already exists in the south-east and East Anglia.