Negative and positive atheism
Positive atheism (also called strong atheism and hard atheism) is the form of atheism that asserts that no deities exist. Negative atheism (also called weak atheism and soft atheism) is any other type of atheism, wherein a person does not believe in the existence of any deities, but does not explicitly assert there to be none.
The terms negative atheism and positive atheism were used by Antony Flew in 1976, and appeared again in Michael Martin's writings in 1990. However, usage of the strong/weak terminology has grown since the mid-1990s on the Internet, particularly due to the newsgroup alt.atheism.[better source needed]
Scope of application 
Because of flexibility in the term god, it is possible that a person could be a positive/strong atheist in terms of certain conceptions of God, while remaining a negative/weak atheist in terms of others. For example, the God of classical theism is often considered to be a personal supreme being who is omnipotent, omniscient, omnipresent, and omnibenevolent, caring about humans and human affairs. One might be a positive atheist for such a deity (see problem of evil), while being a negative atheist with respect to a deistic conception of God by rejecting belief in such a deity but not explicitly asserting it to be false.
Positive and negative atheism are distinct from the philosopher George H. Smith's less-well-known categories of implicit and explicit atheism, also relating to whether an individual holds a specific view that gods do not exist. "Positive explicit" atheists assert that it is false that any deities exist. "Negative explicit" atheists assert they do not believe any deities exist, but do not assert it is true that no deity exists. Those who do not believe any deities exist, but do not assert such non-belief, are included among implicit atheists. Among "implicit" atheists are thus sometimes included the following: children and adults who have never heard of deities; people who have heard of deities but have never given the idea any considerable thought; and those agnostics who suspend belief about deities, but do not reject such belief. All implicit atheists are included in the negative/weak categorization.
The validity of this categorization is disputed, however, and a few prominent atheists such as Richard Dawkins avoid it. In The God Delusion, Dawkins describes people for whom the probability of the existence of God is between "very high" and "very low" as "agnostic" and reserves the term "strong atheist" for those who claim to know there is no God. He categorizes himself as a "de facto atheist" but not a "strong atheist" on this scale. Within negative atheism, philosopher Anthony Kenny further distinguishes between agnostics, who find the claim "God exists" uncertain, and theological noncognitivists, who consider all talk of gods to be meaningless.
Alternate meanings 
Jacques Maritain used the negative/positive phrases as early as 1949, but with a different meaning and in the context of a strictly Catholic apologist. The Atheist Community of Austin (ACA) uses the term positive atheism in a different sense. The ACA refers to positive atheism in the sense of putting a positive face to atheism and dispelling the false and negative image of atheism portrayed by religious people, especially in places of worship.
See also 
- Flew, Antony (1976). "The Presumption of Atheism". The Presumption of Atheism, and other Philosophical Essays on God, Freedom, and Immortality. New York: Barnes and Noble. pp. 14ff. Retrieved 2011-12-10. "In this interpretation an atheist becomes: not someone who positively asserts the non-existence of God; but someone who is simply not a theist. Let us, for future ready reference, introduce the labels 'positive atheist' for the former and 'negative atheist' for the latter."
- Martin, Michael (2006). The Cambridge Companion to Atheism. Cambridge University Press. ISBN 0-521-84270-0.
- "Definitions of the term "Atheism"". Ontario Consultants on Religious Tolerance. 2007. Retrieved 2010-06-01.
- Martin, Michael (1990). Atheism: A Philosophical Justification. Temple University Press. p. 26. ISBN 0-87722-943-0. "negative atheism, the position of not believing a theistic God exists" / "positive atheism: the position of disbelieving a theistic God exists"; p. 464: "Clearly, positive atheism is a special case of negative atheism: Someone who is a positive atheist is by necessity a negative atheist, but not conversely"
- "An Archive of Alt.Atheism".
- The God Delusion, pp. 50–51
- Kenny, Anthony (2006). "Worshipping an Unknown God". Ratio 19 (4): 442. doi:10.1111/j.1467-9329.2006.00339.x.
- Maritain, Jacques (July 1949). "On the Meaning of Contemporary Atheism". The Review of Politics 11 (3): 267–280. doi:10.1017/S0034670500044168. "By positive atheism I mean an active struggle against everything that reminds us of God – that is to say, anti-theism rather than atheism – and at the same time a desperate, I would say heroic, effort to recast and reconstruct the whole human universe of thought and the whole human scale of values according to that state of war against God."
- Atheist Experience #422: Blue Laws. November 11, 2005. Event occurs at 49:55.