Do you think if I put in my two weeks notice before im even through training, hed just fire right then?

I've been at my current job for 5 days. My supervisor is training me, but he's getting very frustrated, because I'm a slow learner, so I was gonna go to my boss, and put in my two weeks notice, but I dont see much reason of keeping me around, since I don't really have a clue of what I'm doing.

Do you think if I put in my two weeks notice before im even through training, hed just fire right then?
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