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23 Sep 2025, 06:44
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Must be reintroduced: Elk
Will not be reintroduced: Eagle
According to a wildlife reintroduction project, exactly four species will be reintroduced in one of three regions: Highlands, Wetlands, or Grasslands. Eight species are under consideration: Wolf, Bison, Otter, Lynx, Bear, Eagle, Elk, and Sheep. The reintroduction follows these rules:
• Eagle can be reintroduced only if the project is not in the Wetlands.
• Bear can be reintroduced only if Bison is also reintroduced.
• Bison can be reintroduced only if the project is in the Highlands or Wetlands.
• Wolf can be reintroduced only if the project is in the Highlands.
• Of the three species Otter, Lynx, and Sheep, exactly one may be reintroduced.
Based on the information above, and assuming Bear is reintroduced and the project is not in the Highlands, in the first column select the species that must also be reintroduced, and in the second column select the species that will not be reintroduced. Make only two selections, one in each column.
• Eagle can be reintroduced only if the project is not in the Wetlands.
• Bear can be reintroduced only if Bison is also reintroduced.
• Bison can be reintroduced only if the project is in the Highlands or Wetlands.
• Wolf can be reintroduced only if the project is in the Highlands.
• Of the three species Otter, Lynx, and Sheep, exactly one may be reintroduced.
Based on the information above, and assuming Bear is reintroduced and the project is not in the Highlands, in the first column select the species that must also be reintroduced, and in the second column select the species that will not be reintroduced. Make only two selections, one in each column.
| Must be reintroduced | Will not be reintroduced | |
| Otter | ||
| Lynx | ||
| Eagle | ||
| Elk | ||
| Sheep |
ShowHide Answer
Official Answer
Must be reintroduced: Elk
Will not be reintroduced: Eagle
23 Sep 2025, 06:44
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Official Solution:
We are told that Bear is reintroduced and that the project is not in the Highlands. Let’s apply the rules one by one:
• If Bear is reintroduced, then Bison must also be reintroduced. So Bear and Bison are both in.
• Since the project is not in the Highlands, Wolf cannot be reintroduced.
• Bison can only be reintroduced if the project is in Highlands or Wetlands. Because Highlands is excluded, the project must be in the Wetlands.
• If the project is in the Wetlands, then Eagle cannot be reintroduced.
At this point, the situation is:
• Bear and Bison are in.
• Wolf and Eagle are out.
That leaves four species still under consideration: Otter, Lynx, Sheep, and Elk.
• By rule, exactly one of Otter, Lynx, and Sheep can be reintroduced. This provides the third species.
• Since four species must be reintroduced in total, the only possible fourth species is Elk.
Correct answer:
Must be reintroduced "Elk"
Will not be reintroduced "Eagle"
Bunuel
We are told that Bear is reintroduced and that the project is not in the Highlands. Let’s apply the rules one by one:
• If Bear is reintroduced, then Bison must also be reintroduced. So Bear and Bison are both in.
• Since the project is not in the Highlands, Wolf cannot be reintroduced.
• Bison can only be reintroduced if the project is in Highlands or Wetlands. Because Highlands is excluded, the project must be in the Wetlands.
• If the project is in the Wetlands, then Eagle cannot be reintroduced.
At this point, the situation is:
• Bear and Bison are in.
• Wolf and Eagle are out.
That leaves four species still under consideration: Otter, Lynx, Sheep, and Elk.
• By rule, exactly one of Otter, Lynx, and Sheep can be reintroduced. This provides the third species.
• Since four species must be reintroduced in total, the only possible fourth species is Elk.
Correct answer:
Must be reintroduced "Elk"
Will not be reintroduced "Eagle"
