Empiricism

===Early empiricism===
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| image1 = kanada.png 
|caption1= [[Kanada (philosopher)|Maharishi Kanada]]
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| caption2= [[Aristotle]]
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Between 600 and 200 BCE, the [[Vaisheshika]] [[darśana|school of Hindu philosophy]], founded by the ancient Indian philosopher [[Kanada (philosopher)|Kanada]], accepted [[perception]] and [[inference]] as the only two reliable sources of knowledge.<ref name=dpsb>DPS Bhawuk (2011), Spirituality and Indian Psychology (Editor: Anthony Marsella), Springer, {{ISBN|978-1-4419-8109-7}}, page 172</ref><ref name=eliott>Eliott Deutsche (2000), in Philosophy of Religion : Indian Philosophy Vol 4 (Editor: Roy Perrett), Routledge, {{ISBN|978-0815336112}}, pages 245-248</ref><ref name=jag>John A. Grimes, A Concise Dictionary of Indian Philosophy: Sanskrit Terms Defined in English, State University of New York Press, {{ISBN|978-0791430675}}, page 238</ref> This is enumerated in his work ''[[Vaiśeṣika Sūtra]]''. The [[Charvaka]] school held similar beliefs, asserting that perception is the only reliable source of knowledge while inference obtains knowledge with uncertainty.

The earliest Western proto-empiricists were the [[empiric school]] of ancient Greek medical practitioners, founded in 330 BCE.<ref>{{Cite web|url=http://www.greekmedicine.net/whos_who/Alexander_the_Great.html|title=Greek Medicine: Alexander the Great|website=www.greekmedicine.net}}</ref> Its members rejected the doctrines of the [[dogmatic school]], preferring to rely on the observation of ''[[phantasiai]]'' (i.e., phenomena, the appearances).<ref name=sini>Sini, Carlo (2004), "Empirismo", in Gianni Vattimo et al. (eds.), ''Enciclopedia Garzanti della Filosofia''.</ref> The Empiric school was closely allied with the [[pyrrhonism|Pyrrhonist]] school of philosophy, which made the philosophical case for their proto-empiricism. 

The notion of ''[[tabula rasa]]'' ("clean slate" or "blank tablet") connotes a view of mind the as an originally blank or empty recorder (Locke used the words "white paper") on which experience leaves marks. This denies that humans have [[innate ideas]]. The notion dates back to [[Aristotle]], {{Circa|350 BC}}:

{{Blockquote|
What the mind (''[[nous]]'') thinks must be in it in the same sense as letters are on a tablet (''grammateion'') which bears no actual writing (''grammenon'');  this is just what happens in the case of the mind.  (Aristotle, ''[[On the Soul]]'', 3.4.430<sup>a</sup>1).}}

Aristotle's explanation of how this was possible was not strictly empiricist in a modern sense, but rather based on his theory of [[potentiality and actuality]], and experience of sense perceptions still requires the help of the [[active intellect|active ''nous'']]. These notions contrasted with [[Platonism|Platonic]] notions of the human mind as an entity that pre-existed somewhere in the heavens, before being sent down to join a body on Earth (see Plato's ''[[Phaedo]]'' and ''Apology'', as well as others).  Aristotle was considered to give a more important position to sense perception than [[Plato]], and commentators in the Middle Ages summarized one of his positions as "''nihil in intellectu nisi prius fuerit in sensu''" (Latin for "nothing in the intellect without first being in the senses").

This idea was later developed in ancient philosophy by the [[stoicism|Stoic]] school, from about 330 BCE. Stoic epistemology generally emphasizes that the mind starts blank, but acquires knowledge as the outside world is impressed upon it.<ref>{{cite book|last1=Bardzell|first1=Jeffrey|title=Speculative Grammar and Stoic Language Theory in Medieval Allegorical Narrative: From Prudentius to Alan of Lille|date=June 11, 2014|publisher=Routledge|pages=18–19}}</ref> The doxographer [[Aetius (philosopher)|Aetius]] summarizes this view as "When a man is born, the Stoics say, he has the commanding part of his soul like a sheet of paper ready for writing upon."<ref>Diels-Kranz 4.11 translated by {{cite book|last1=Long|first1=A. A.|last2=Sedley|first2=D. N.|title=The Hellenistic Philosophers: Vol. 1|date=1987|publisher=Cambridge|location=Cambridge, Ma|pages=238}}</ref>

[[File:Avicenna.jpg|thumb|right|A drawing of [[Avicenna|Ibn Sina]] (Avicenna) from 1271]]