As stated previously, atheism presupposes the non-existence of any gods. There are many different offshoots of an atheistic worldview. Currently, there are also two schools of thought regarding self-proclaimed atheists, including strong atheism and weak atheism.
Strong atheism is complete denial of the existence of deity in any form. The existence of true atheist beliefs has been debated over the years and strong atheism has many inherent flaws in its nature. To date, there has been zero conclusive scientific or philosophical arguments that disprove the existence of divinity. One who professes to be a strong atheist must then prove that he or she is omniscient (all knowing).
Here is the contradiction. A strong atheist must deny divinity by attributing man with divine abilities. Common atheistic observation concludes that man is a finite being and can only obtain knowledge through personal experience and application (Theists differ in this because knowledge can be revealed to man through acts of the divine, i.e. revelation). The strong atheist needs to not only have all the knowledge of every person ever but also all of the knowledge in the universe.
It can be concluded that a strong atheistic worldview, no matter how eloquently explained, is impractical and illogical. Clinging to a strong atheistic view requires that one must reject scientific and philosophical evidence currently known and yet to be known.
Weak atheism, however, covers a much wider range of atheistic beliefs. Typically, weak atheism is attributed to those with any sort of non-theistic worldviews. This not only includes agnostic views but also religions that do not require a personal god can fit into this category. For the sake of argument, religions will be discussed generically as theistic worldviews.
The common atheist on the street rarely knows exactly what atheism is. When evangelizing, ask questions pointed at revealing a person's worldview. Often times, atheists are agnostics, while some people simply don't like the idea of God. This opens up the doors of personal reflection into what people want to believe, what they really believe, and why they want to believe it. Pointed questions can often reveal reality and a person's responsibility to react to it.
