This part of the game doesn’t make sense

When Jason meets Citra for the first time in her temple, Jason asks Citra for help so he can find his friends, after that Citra offers Jason a unknown drink and tells him “find the thing im looking for” (if im correct) and Jason drinks it then proceeds to have hallucinations about a man dressed in white tuxedo which leads Jason to a path so he can find a “ancient knife”. Then when Jason wakes up he tries to recreate what happened in his dream by firstly interrogating the suspicious guy which he never met, can someone tell me how did Jasons mind make all that up because predicting the future in your own hallucinations is not possible.