Salaam,
I was just thinking, when someone reverts to Islam, is there like a milli-second difference where they were atheists? At the point when they object their previous beliefs and at the transition point when they become Muslim.
assalamo alaikum..
I'm going to try my best answering this..hopfully i'll make sense..and be correct in what I'm saying..
I don't think they would be atheist..
because remember?
everyone is born into monotheistic fitrah..and it is the environment that instills other beliefs in individuals..
and also no matter what a person is (i.e. jewish..buddhist..christian) in this life..
when the souls of all humans were created..Allah (swt) asked them..*am I not your Lord?*..and the souls answered *yes..we bear witness that You are* (it's verse 172 in surat Al-A'araaf the 7th chapter of the Qura'an)..
now the verse was to record that Allah (swt) made all soul bear witness to that..so they don't try to deny knowing anything about Him (swt) on Judgement Day..or say that their forefathers were the ones who made them go astray..and all that!
BUT..it would apply to reverts (as I think)..because technically the person..is only *re-acknowledging* or *re-instating* what his/her soul had witnessed to or pledged to acknowledge (basically..the shahada..La Ilaha Illa Allah..There's no God but Allah) when it was first created..
I don't know if I made sense..but it's hard to find the word for it like you said..you have to sort "explain it"..so I apologize if I caused confusion
wa alaikum assalam