In the morning believer started doubting his beliefs and non-believer started to question his position also.
While one may say arguments of beliefs bring more understanding of the belief, too much argument of basics of beliefs is never helpful.
Short term discussion is alright though.
A very small minority would change his/her belief by arguments and logical discussions.
**
It takes personal observations, efforts and struggle to convert or revert. Not by direct arguments or Munaziray.**
Just for curiosity bro, what did you mean by red part?