Meaning of “emphasis” in this context [closed]

It is as if the “I know” does not go well with a metaphysical emphasis (Ludwig Wittgenstein, On Certainty)

In this context, what is the meaning of the word “emphasis?”

Solution 1:

From Lexico:

emphasis: Special importance, value, or prominence given to something.

metaphysical: Relating to metaphysics.

metaphysics: The branch of philosophy that deals with the first principles of things, including abstract concepts such as being, knowing, substance, cause, identity, time, and space.

Metaphysics has two main strands: that which holds that what exists lies beyond experience (as argued by Plato), and that which holds that objects of experience constitute the only reality (as argued by Kant, the logical positivists, and Hume). Metaphysics has also concerned itself with a discussion of whether what exists is made of one substance or many, and whether what exists is inevitable or driven by chance [emphasis mine]

Wittgenstein turned to logical positivism in the 1920s, long before he created the content that came to compose On Certainty, which is why I've used the definition of metaphysics cited above.

What the sentence you've quoted is saying is that if you try to add "special importance, value, or prominence" to the metaphysical aspects of "I know," it will not work well because "I know" flies in the face of the above definition of metaphysics, "which holds that objects of experience constitute the only reality."