You are not understanding the point pix. He is saying, in the context of your example, that 2+2=5 is not something you can 'know'. You can know 2+2=4, and you can know 2+2!=5, but you can't know 2+2=5. You can't 'know'(know as in 'know it is true') that which is itself not true.
Jim
Jim
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