First of all, we can get around to not knowing what 'ozo' and 'ulu' mean by including the words themselves in the questions, and secondly, if we load each question with a hypothetical condition, whether an alien is lying or not won't actually matter.
Pertama-tama, kita bisa mengakali ketidaktahuan kita akan 'ozo' dan 'ulu' dengan menyertakan kata tersebut di pertanyaan kita, dan kedua, jika kita menyertakan kondisi hipotetis ke pertanyaan kita, kita tak perlu peduli apakah mereka berbohong atau tidak.