Our lives are based on certain assumptions. We take things for granted without proof. We treat things as a given.
Ideas such as 'religion' and 'monarchy' are widely accepted. And unchallenged.

There is a certain arrogance implicit within an assumption; the idea is treated as reality, regardless of fact.
People often believe that they have a right to do things a certain way. They assume authority.

They sometimes think that their way is the only way to do things.
Consider 'Windows' on your computer...
There are different ways to open and close a window. Different ways to save data.
Each of these methods is equally valid.
We cannot assert that there is just one correct approach. We would be incorrect to make such an assumption.