> It is the first one that shocks me. A => B, A, means B
> As to the second, you can conclude nothing.
Can you conclude 'maybe A'?
> Specifically, you have no information about A.
> A => B, B, no extra conclusions can be drawn.
> I have run into people that confused A => B with A <=> B. I think is
> relatively common, if you teach it to a normal high school class.
Perhaps if it is valid to conclude 'maybe A' that different people intuit
'maybe' as 'probably'.
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