Given: 1. Sparrows are attracted by birdseed. 2. If you attract sparrows, kestrels will come to hunt the sparrows. 3. You want to see kestrels, but you don’t want to unwittingly engineer a sparrow slaughter. 4. Crows are attracted by peanuts. 5. Crows repel kestrels, but only until they’ve removed all of the peanuts, and, […]