How are we justified?

1: What do you see?
2: I see an apple on the table
1: How do you know that your senses aren’t fooling you?
I will cross reference my observation with others and make a conclusion from the findings.1: how do you know you aren’t mad?
I maybe, but I'm not blind.1: how do you know anything?
Learning.1: then how are you justified in saying there’s an apple on the table
I just ate it and I concluded it was a tasty apple that I saw.*Walks away chewing apple*

There's a simple solution: Don't care about being justified. I don't care whether I'm justified in saying that.