The article presents five logic problems involving two types of aliens, Cricks and Goops. Cricks can only ask questions that require a 'yes' answer, whereas Goops can only ask questions that require a 'no' answer. The first problem highlights the impossibility of an alien asking if they are a Goop without contradiction. The second establishes the identities of two aliens based on a question about their type. A third problem considers the implications of questioning the presence of a wizard on the planet, ultimately concluding a wizard does exist based on the nature of the question asked.
If the answer is yes, then the questioner is a Crick and if they can ask whether there is a wizard on the planet, that means there is a wizard on the planet, as Cricks can only ask questions to which the answer is yes.
Say the answer is no, then Katja is a Goop. But if it is not the case that at least one is a Goop, none are Goops, and there is a contradiction.
If the answer is no, then the person must be a Goop because only Goops ask such questions. But if the answer is no, they are stating they are not a Goop.
But if the answer is yes, they are a Crick. But if the answer is yes, they are a Goop! This situation is also impossible.
Collection
[
|
...
]