JUSTIFIED BELIEFS (Source: Chris Redford)

Every justified belief that we have about reality is ultimately grounded in evidence.

And, conversely, beliefs that are not grounded in evidence and beliefs that are grounded in less evidence are unjustified and more weakly justified respectively.

Even in defending evidence, I have to use evidence to be justified.

Evidence is essential to the verification process.

In other words, I form beliefs about reality based on physical evidence. The strength of my belief should be directly proportional to the amount of evidence I have for them. If I ever doubt the validity of a conclusion I  make based on evidence, I can return to that evidence, re-examine it, and see if I come to the same conclusion. Even in defending evidence, I have to use evidence to be justified. Therefore, evidence is essential to the verification process.

Although my direct perception is the strongest evidence, it would be unfeasible for me to personally collect all the evidence I use for my beliefs; however, I can gather evidence indirectly in the form of the multimedia and testimonies given by other people. But, I cannot place as much confidence in multimedia and testimonials--written, spoken, or otherwise--as I can in direct physical evidence that I myself perceive.

Thus, if I want to maximize my confidence in a belief, I should only use indirect evidence given to me by other people as a starting point and then directly verify the physical evidence myself. If I refuse to do this for any belief, I must accept that my confidence in it should be lower than my confidence in a belief based on evidence that I have directly verified.