You said you don't need science to know your t-shirt is red.
Depends on what you mean by "know".
Would
you say (assuming you had all of these thing) "I know my T-shirt is red, my pet is a dog and my house number is 43"? Or would you instead say "I cannot know any of these things to be absolutely true, because it's always possible I could be mistaken"?
But you also said science is the most reliable method for knowing what is true.
No, I didn't. I said:
"Perhaps it might be more helpful to ask "Is science the most reliable method of testing if something is true"? In which case, the answer would be "Yes".
Testing. Not knowing. They're two different things.
Unless you're saying "I am testing what colour my T-shirt is when I look at it," which would be a rather strange use of the word "test".
So when you believe your t-shirt is red sans science, do you know that belief is true?
No. I could be wearing coloured contact lenses without knowing. I could be under some form of mind control. I could be dreaming. Generally, however, we do not say "I'd like to say that I have a red T-shirt, but who among us can really know anything for certain?"
If a simple observation that your t-shirt is red is less reliable than scientifically testing your t-shirt for color, then can you really say you "know" it's red, or do you only believe it's red?
If I am wrong about this, I am probably wrong about everything else that I think to be true. Therefore, I shall say that I "know" I am wearing a red T-shirt, for the sake of not having to continually evaluate everything that forms a part of my reality. That's what people generally mean when they say they "know" something.
I find it curious that your question in this thread is "Is science the only way of knowing" when scientists would tell you that we can never prove anything in science. Anything we think we know is, in science, at least technically provisional; in other words, a good scientist acknowledges that they could always be wrong.
So it looks to me like you're just quibbling here about the meaning of the word "know", and I'm still not really sure what your purpose it. Your reference to the other thread didn't help me much.
Oh well. I suppose if you want us to know, you'll tell us.