Aristoteles
Rhesymeg
Gramadeg
Cicero
Bertrand_Russell
Gottfried_Wilhelm_Leibniz
Georg_Hegel
Rhethreg
Lewis_Carroll
Cystrawen
Avicenna
Set_(mathemateg)
Symbol
Blaise_Pascal
Alan_Turing
John_Stuart_Mill
Damcaniaeth_setiau
Anfeidredd
Gwirionedd
Semanteg
Ludwig_Wittgenstein
Pythagoras
Ffugwyddoniaeth
Galen
Rhesymu
John_von_Neumann
David_Hilbert
Stereoteip
Averroes
Francis_Bacon
Positifiaeth
Charles_Babbage
Os_ac_yn_unig_os
Dilechdid
Pragmatiaeth
Gwireb_(mathemateg)
William_o_Ockham
Pierre_Abélard
Gottlob_Frege
Georg_Cantor
Paradocs
Barn
Al-Ghazali
Diffiniad
Zenon_o_Elea
Rhesymeg_mathemateg
Ysgolheictod
Rasel_Ockham
Enwoliaeth
Rhesymoledd
Francis_Hutcheson
Bernard_Bolzano
Gramadeg_Lladin
Cylch_Fienna
Tuedd
Tebygolrwydd_amodol
Wilhelm_Wundt
Roger_Bacon
Maria_Gaetana_Agnesi
Diagram_Euler
Richard_Ithamar_Aaron
Dilema
Rudolf_Carnap
Principia_Mathematica
Isaac_Watts
Meddwl_grŵp
Uwchiaith
Damcaniaeth_yr_alarch_du
Effaith_cynhysgaeth
Duns_Scotus
Ramon_Llull
Ipso_facto
Alcuin
Charles_Sanders_Peirce
Synnwyr_cyffredin
Damcaniaeth_setiau_Zermelo–Fraenkel
Ampersand
Edward_de_Bono
Cysyniad_a_gwrthrych
Twyllresymeg_y_chwimsaethwr_o_Decsas
Mary_Everest_Boole
Dorothy_Maud_Wrinch
Camsyniad_teimladol
Penelope_Maddy
Ipso_jure