"Post hoc ergo propter hoc" is one of my favourite fallacies simply for its inevitable reoccurence. I think it is the source of most, if not all, of the current environmental movement. It certainly fuels the Man Made Global Warming debate.
So here's an example of this fallacy in a different setting. I will caution you that the writer sharing this tale has a less than politically correct telling of the tale. I include this tale on this website in order to show the reader that while I personally disdain owner's manuals and instructions, I will fess up to admitting that I actually read such things before I take out my soldering iron. The days of unlimited budgets are over. I actually have to pay the bills out of my own pocket. And I'm selfish. I'd rather have the dough than the repair bill.
So, politically correct or not, here's a rather funny story about a picture you may have seen on the intertubes.
Remember, post hoc ergo propter hoc has real costs associated for bad thinking. This is just a case where the cost is immediately apparent. So much fallacious thinking has costs only for the other guy. And if you're penalizing the other guy for your erroneous thinking, you may not even be aware of those costs. Besides, they're bad and you're good. So it doesn't matter.
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