Hmm, I know epistemology can be hard to fathom (and frankly is not my thing, my thing being philosophy of language), but I thought my statement was one of the b

Hmm, I know epistemology can be hard to fathom (and frankly is not my thing, my thing being philosophy of language), but I thought my statement was one of the basic definitions. I would be interested if you can point me to work that considers a statement like "I know that Chicago is the capital of Illinois" (it's Springfield) tenable. I was taught that this was an incorrect usage of know.