Right now in 1 $ competition, we have a Rule saying
"You can post as many answers as you like, but only your last posted answer will be considered."
What I am proposing is what Shabbir gave in "Name of the Child" i.e.
"Only one and the first reply would only be considered for each user."
Actually more of first Answer would only be considered for each user.
Not only it will make people think before posting there answers, there will be least amount of confusion as to which answer is eligible for each user.
Please Vote for Yes/No/Other
Post the other answer here so that we can consider that too.