Towards radical skepticism:

Philosophically, I am a radical skeptic. That is, if we think of "knowing" as meaning certain knowledge, then I don't think there is anything we can know, because all such knowledge is based on observation (which can be faulty), logic (which can be faulty) or faith (which is usually faulty).

How do we know that logic always works?\

Rather than knowing and not knowing, I think we have degrees of sureness. I am very sure that my name is Peter. But not certain. I am pretty sure I will wake up tomorrow. I am reasonably sure that it will rain tomorrow (the forecast right now is at 100% chance, and the forecasts are pretty good for the next day).

Are you certain of anything? What? Why?