In Pakistan is Stoning Seen as an Appropriate form of Punishment?

Re: In Pakistan is Stoning Seen as an Appropriate form of Punishment?

Continuing on this information, some people think that it is ridiculous that 4 witnesses need to verify the act first hand as it would never be possible in a consensual situation.
That would mean that the harsh punishment could never really be administered. So it becomes mostly a symbolic punishment. However, the severity of the potential punishment conveys the message as to how grave this sin is.
I don’t know how this works out to convict a rapist.