| HUME | David, Scottish philosopher born in 1711 (4) |
| NOAM | **** Chomsky, activist and linguistics philosopher born in 1928 (4) |
| MACH | David -, Scottish artist whose work includes 1999 installation Big Heids (4) |
| RAND | Controversial novelist-philosopher born 2/2/1905 |
| REID | Thomas ?, Scottish philosopher whose works include An Inquiry into the Human Mind on the Principles of Common Sense (4) |
| KARLPOPPER | Philosopher born in Vienna in 1902 last to talk with unusually proper pal (4,6) |
| LOCKE | English philosopher born in Wrington, Somerset in 1632 (5) |
| BARUCH | ****** Spinoza, philosopher born in Amsterdam in 1632 (6) |
| NACHMANIDES | Medieval Jewish scholar and philosopher born in Girona in 1194 (11) |
| BRONOWSKI | Jacob ___, mathematician and philosopher born in Poland in 1908 (9) |
| WITTGENSTEIN | Ludwig --, philosopher born in Vienna (1889-1951) (12) |
| DIOGENES | Greek Cynic philosopher born in Sinope who advocated self-sufficiency |
| CONFUCIUS | Ancient Chinese philosopher born in 551 BC (9) |
| KRISHNAMURTI | Spiritual writer-philosopher born in British India |
| HEGEL | Georg Wilhelm Friedrich, German idealist philosopher born in 1770 (5) |
| ENGELS | Friedrich, German socialist philosopher born in 1820 (6) |
| CHWISTEK | Leon _, Polish painter and philosopher born in 1884 (8) |
| WEININGER | Otto ********* , Austrian philosopher born in 1880 (9) |
| MARCUSE | Herbert ****. German-US philosopher born in 1898 (7) |
| EPICURUS | Greek philosopher born in 341 BC who authored treatise On Nature |
