Polyneices was considered a traitor by King Creon for attacking the city of Thebes. Polyneices body was not permitted to be buried, but left for the scavenger birds and dogs to eat. Eteocles was to receive a hero's burial.
Because people may have certain biases and change the rewritten law (which is a secondary source) which may not be as accurate as the primary source.
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Tom asks Huck to take a shirt from the clothesline which Jim can use as a journal while he is in prison. Huck is surprised, because Jim can't even write.