The post was about downvotes, not XP. They are related, but there is a difference. Also, the question was not why you downvote, but why you downvote and do not supply an explanation. In other words, the poster is concerned about learning and understanding Perl, by receiving some useful guidance when he posts something that is deficient.
Caution: Contents may have been coded under pressure.

In reply to Re^2: Why downvote nodes without commenting on them? by Roy Johnson
in thread Why downvote nodes without commenting on them? by danmcb

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