Ong (1912–2003) Graham Oppy (born 1960) Toby Ord (born 1979) Gloria Origgi (born 1967) Rocío Orsi (1976-2014) Charles E. Osgood (1916–1991) Blake Ostler (born 1957) Konrad Ott (born 1959) James Otteson (born 1968) Albert Outler (1908–1989) Gwilyn Ellis Lane Owen (1922–1982) Joseph Owens (1908–2005) Susan Oyama (born 1943) P Jesús Padilla Gálvez (born 1959) Peter Pagin (born 1953) Clare Palmer (born 1967) Arthur Pap (1921–1959) David Papineau (born 1947) George Pappas (born 1942) Derek Parfit (1942–2017) Rohit Jivanlal Parikh (born 1936) Adrian Parr (born 1967) Charles Parsons (born 1933) Terence Parsons (born 1939) Barbara Partee (born 1940) John Passmore (1914–2004) Jan Patočka (1907–1977) Paul R. Patton (born 1950) L. A. Paul David L. Paulsen (1936-2020) Christopher Peacocke (born 1950) David Pearce David Pears (1921–2009) Shirzad Peik Herfeh (born 1980) Leonard Peikoff (born 1933) Jean-Jacques Pelletier (born 1947) Zbigniew Pełczyński (1925–2021) Lorenzo Peña (born 1944) Carlo Penco (born 1948) Terence Penelhum (1929–2020) Roger Penrose (born 1931) Walker Percy (1916–1990) Derk Pereboom (born 1957) Carlos Pereda Chaïm Perelman (1912–1984) John Perry (born 1943) Richard Stanley Peters (1919–2011) Anna L. Peterson (born 1963) Philip Pettit (born 1945) Herman Philipse (born 1951) D. Z. Phillips (1934–2006) James Andrew Phillips Giovanni Piana (1940–2019) Alexander Piatigorsky (1929–2009) Eva Picardi (1948-2017) Gualtiero Piccinini (born 1970) Hanna Pickard (born 1972) Catherine Pickstock (born 1970) Josef Pieper (1904-1997) Jessica Pierce (born 1965) Massimo Pigliucci (born 1964) Adrian Piper (born 1948) Robert B. Pippin (born 1948) Madsen Pirie (born 1940) Robert M. Pirsig (1928–2017) George Pitcher (1925–2018) Ullin Place (1924–2000) John Plamenatz (1912–1975) Alvin Plantinga (born 1932) Mark de Bretton Platts (born 1947) Evelyn Pluhar Val Plumwood (1939–2008) Deborah C. Poff Thomas Pogge (born 1953) Louis P. Pojman (1935–2005) John L. Pollock (1940–2009) Leonardo Polo (1926–2013) Edward Pols (1919–2005) Richard Polt Richard Popkin (1923–2005) K. J. Popma (1903–1986) Karl Popper (1902–1994) Richard Posner (born 1939) Mark Poster (1941–2012) Carl Posy Van Rensselaer Potter (1911–2001) John Poulakos (born 1948) Vaughan Pratt (born 1944) Dag Prawitz (born 1936) Huw Price (born 1953) Graham Priest (born 1948) Jesse Prinz Arthur Prior (1914–1969) Duncan Pritchard James Pryor (born 1968) Harry Prosch (1917–2005) Alexander Pruss (born 1973) James Pryor (born 1968) Stathis Psillos (born 1965) Lorenz Bruno Puntel (born 1935) Hilary Putnam (1926–2016) Ruth Anna Putnam (1927–2019) Andrew Pyle (born 1955) Zenon Pylyshyn (born 1937) Q Qiu Renzong (born 1933) Willard Van Orman Quine (1908–2000) Philip L. Quinn (1940–2004) Anthony Quinton (1925–2010) Sayyid Qutb (1906–1966)