Todd,

You did cover most of the PP repeats and you summed them up well, but you forgot perhaps the most common and predictable one of all. Habitat vs. Harvest

"The salmon runs are down because of loss of habitat. No, its harvest. If the fish can't get to the river they can't spawn. Yeah, but when the headwaters are all clear-cut, the slopes wash into the streams, the streams fill up and Stam begins fly fishing. Yeah, well my dad logged every God damn tree on the whatchamacallit river and the next year they had a record run. Well, you smoke pole. Well, your mothers a transvestite. . .
"
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No huevos no pollo.