Recently when pondering about the hypothetical scenario of a first contact, the alien race we met may have very different cultures, ethics, technologies, philosophies etc. to the point that whatever they present are phenomenon or things that human language does not came up with terms to describe yet, let alone comprehend yet. (For example, suppose the extreme case where the alien is a Lovecraftian creature)
But like all ambassador meetings between two distinct cultures, communication is important and if a misconception is allowed to grew, it can escalate into conflict very quickly.
By focusing this issue in terms of trying to figure out the alien's language on what behaviour are considered hostile to them, and what behaviours of them are considered hostile to us, it does seemed to be a very complex generalisation of the famous True, False, Random puzzle.
Therefore for the narrow aspect of both sides trying not to screw up the communication by trying to make the least mistake possible in learning the most possible of each other's language and culture
What is the most efficient and reliable way to learn a completely foreign culture and minimising life threatening conflicts?
Can logic learnt from the True False Random puzzle be generalised to handle such scenarios?
Addenum: Some users might consider the same type of question could be asked between a developed nation vs an unknown tribe or group, or humans trying to communicate with other terrestial organisms, or even human communicating with superhuman AI. While the context are similar, the degree of tension is very different for the extraterrestial case as neither side knew well of the capabilities of the other to harm each other, whereas for the other cases, there is still a basis to guess their capabilities to threaten humans.