What is truth? What sets the standard for truth?

Is everyone’s opinion of truth different? For the most part we all been brought up in cultures from our parents and we grow and we choose our own culture or stay with the same.

Please I’d like to hear all opinions and also for my Christian brothers and sisters… an answer without quoting a scripture please. Or saying God.🌞🙏🏿 there’s a method to the madness.🫡