Example 1 On a distant island, there live two tribes, one is the "Honest Tribe," and the other is the "Lying Tribe." As the names suggest, the people of the Lying Tribe always lie when speaking or answering questions, while the people of the Honest Tribe always tell the truth.

A journalist encountered four islanders on this island and, as usual, interviewed them: “What tribes are you from? Are you from the Honest Tribe or the Lying Tribe?”
The four people answered as follows:
The first person said: “We four are all from the Lying Tribe.”
The second person said: “One of us is from the Lying Tribe.”

The third person said: “Two of us are from the Lying Tribe.”
The fourth person said: “I am from the Honest Tribe.”
So, what tribe is the fourth person from?
Explanation: From the first person's answer, we can determine:
(1) The first person is from the Lying Tribe (if the first person were from the Truthful Tribe, they would not claim to be from the Lying Tribe);
(2) Among the four people, there must be someone from the Truthful Tribe (otherwise, the first person would be telling the truth, which contradicts the fact that they are from the Lying Tribe).

From the second and third person's answers, we can determine:
The second person is from the Lying Tribe (if they were telling the truth, then the second, third, and fourth persons would all be from the Truthful Tribe, which contradicts the third person's statement).

Now let's consider the third person. If they are from the Lying Tribe, then by (2), the fourth person must be from the Truthful Tribe. If they are from the Truthful Tribe, then by their statement, the third and fourth persons are from the Truthful Tribe. Therefore, regardless of whether the third person is from the Truthful Tribe or the Lying Tribe, it can be concluded that the fourth person is from the Truthful Tribe.