Guess it depends on how convinced you are
From the
Free DictionaryQUOTE
An agnostic does not deny the existence of God and heaven but holds that one cannot know for certain whether or not they exist.
And.... QUOTE
Atheist - One who disbelieves or denies the existence of God or gods.
That second one came up on my screen accompanied by an ad for Scientology
Perhaps "platform neutral" would be better
One newspaper I worked for decided to make a whole department of journalists redundant and the HR paperwork was, inevitably, full of jargon. HR people were a bit put out (to say the least) when they got about 50 letters, phone calls and emails asking what it all meant in plain English. The journalists did know, of course - just wanted to make a point.
Oh, and we over here reckon Americans utilise "z" far too often