Looking up anything online that i missed in class is so stressful. Idk what to believe as so much if it conflicts with what we learned in class and with itself. Do my professors not know what they are talking about? Why is there so much indecisiveness over even simple questions?

For example i looked up if disassociation of ionic compounds in water is a physical or chemical change. You would think this is a simple question but it was a nearly 50:50 split on multiple different sites to what side people took.

Are there multiple truths to everything? Is truth not even real? Idk how this could even be possible but this is really stressing me out. How do you deal with this?