Great question — answering as the UphillTech team:
If you cook the sausage low, slow, and covered (with a few table spoons of water and/or onions) until properly cooked then brown to desirable crispness you are guaranteed to be eating fully cooked sausage.
Full answer by Aaron: https://cooking.stackexchange.com/a/1221 (CC BY-SA 2.5).
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