Final answer:
Being unsure about the existence of god while not affirming atheism is termed agnosticism. Agnostics assert that the nature of the divine is unknowable, distinguishing them from atheists and 'nones', who simply lack religious affiliation.
Step-by-step explanation:
If you do not believe in god but are not an atheist, the term that best describes this position is agnosticism. An agnostic is someone who holds that the existence of ultimate reality, such as God, is unknowable and maintains a posture of skepticism towards such claims.
This differs from atheism, which is the belief that there is no god or gods. It's worth noting that agnostics and atheists can both be moral and upstanding members of society, as many have made notable humanitarian contributions. The 'nones' are also relevant here, referring to those who do not affiliate with any organized religion and may still hold various spiritual or secular beliefs.