Well I think that first that all is the post, so first read all the post and then evaluate the vote. If the post is good enough (worthy) then vote ++, but if the post is not close to your expectations or the correct answare vote --.

The person how write the post may commit errors. and this is a good way to show him/her where are they.

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God help me always to see the other face of the coin. And prevent me from accusing of betrayal those who don't think just as I do.