Radical Skepticism

I need an explanation for this Philosophy question to help me study.

For this discussion post please answer the following:

Since the time of ancient Greek philosophers such as Carneades, Pyrrho, and Sextus Empiricus, some thinkers have claimed that some version of skepticism about knowledge is true. Others have rejected such skepticism. One version of radical skepticism about knowledge is the claim that human beings cannot obtain knowledge about anything whatsoever. Do you agree with this view? Why or why not?

Minimum 250 words. Please cite references

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