Parmenides of Elea ( /pɑrˈmɛnɨdiːz əv ˈɛliə/; Ancient Greek: Παρμενίδης ὁ Ἐλεάτης; fl. early 5th century BC) was an ancient Greek philosopher born in Elea, a Greek city on the southern coast of Italy. He was the founder of the Eleatic school of philosophy. The single known work of Parmenides is a poem, On Nature, which has survived only in fragmentary form. In this poem, Parmenides describes two views of reality. In "the way of truth" (a part of the poem), he explains how reality (coined as "what-is") is one, change is impossible, and existence is timeless, uniform, necessary, and unchanging. In "the way of opinion," he explains the world of appearances, in which one's sensory faculties lead to conceptions which are false and deceitful. These ideas strongly influenced the whole of Western philosophy, perhaps most notably through its effect on Plato.
Raymond Tallis F.Med.Sci., F.R.C.P., F.R.S.A. (born 1946 in Liverpool) is a British philosopher, secular humanist, poet, novelist, cultural critic and retired medical doctor.
On leaving Liverpool College, Tallis gained an Open Scholarship to Keble College, Oxford where he completed a degree in animal physiology in 1967. He completed his medical degree in 1970 at the University of Oxford and St Thomas' Hospital in London. From 1996 to 2000, he was Consultant Adviser in Care of the Elderly to the Chief Medical Officer. In 1999-2000, he was Vice-Chairman of the Stroke Task Force of the Advisory Group developing the National Service Framework for Older People. He has been on the Standing Medical Advisory Committee and the Council of the Royal College of Physicians and was secretary of the Joint Specialist Committee of the Royal College on Health Care of the Elderly between 1995 and 2003. He was a member of the Joint Task Force on Partnership in Medicine Taking, established by Alan Milburn, the Secretary of State for Health, in 2001. For three years he was a member of one of the appraisal panels of the National Institute of Clinical Excellence. He retired in 2006 as Emeritus Professor of Geriatric Medicine at the University of Manchester.
Bertrand Arthur William Russell, 3rd Earl Russell, OM, FRS (18 May 1872 – 2 February 1970) was a British philosopher, logician, mathematician, historian, and social critic. At various points in his life he considered himself a liberal, a socialist, and a pacifist, but he also admitted that he had never been any of these in any profound sense. He was born in Monmouthshire, into one of the most prominent aristocratic families in Britain.
Russell led the British "revolt against idealism" in the early 20th century. He is considered one of the founders of analytic philosophy along with his predecessor Gottlob Frege and his friend Ludwig Wittgenstein, and is widely held to be one of the 20th century's premier logicians. He co-authored, with A. N. Whitehead, Principia Mathematica, an attempt to ground mathematics on logic. His philosophical essay "On Denoting" has been considered a "paradigm of philosophy." His work has had a considerable influence on logic, mathematics, set theory, linguistics, computer science (see type theory and type system), and philosophy, especially philosophy of language, epistemology, and metaphysics.