The way you see things, you know you are right. And that's true, you are indeed right from your perspective. But when someone disagrees with you, they see things differently, and from their viewpoint they are also right.
But how can two contradictory things both be right? Simple! Here's how to change your life...
Take a business card printed on one side only. Show the blank side to the person sitting opposite you. Ask them to describe exactly what they see, rather than what they know, and they'll say the card is blank.
But you're seeing the printed side, and so you're being equally truthful when you say the card is printed, not blank.
Yes, the description you come up with depends on your perspective! And since your viewpoint is different, your description is also different.
So even when what the two of you say is apparently contradictory, I'm right does NOT mean you are wrong. The secret of success is to realize everyone is right from the way they look at things.
Perspective is Limited
When you look at something from one angle, that always means you're not looking from another. At any one moment, perspective is always restricted, you don't have eyes in the back of your head and you can't see round corners.
Your current viewpoint forms part of your context, which encompasses your past, your present, and your future. Your context includes what you already know, and what you expect to happen, as well as your environment, upbringing, religious background, secular education, past and present relationships and experiences in life, etc. etc. Your context is unique, very limited, and drastically different to everybody else's.
Given their context, they may well be sincere when they say what they say, although they can also be sincerely mistaken. And so could you.
Aside. This helps explain why double-blind studies are more effective. Double-blind studies go some way to eliminating differences in context. Context always matters, and affects the result.