type Query {
  pet: Dog
}

type Dog {
  nickname: String
  name: String!
}

query queryPupper {
  pet {
    ...conflictingBecauseAlias
    ...sameAliasesWithDifferentFieldTargets
  }
}

fragment conflictingBecauseAlias on Dog {
  name: nickname
  name
}

fragment sameAliasesWithDifferentFieldTargets on Dog {
  fido: name
  fido: nickname
}