I have seen a number of these, and hate to ask another one, but when I count my accepted answers, it seems that I should have the Tenacious badge. The fact that I haven;t means I have probably misunderstood something about it.
I have 6 zero score accepted answers, and 13 scored accepted answers. This should therefore count as more than 5 and more than 20% of the total.
Or does it mean less that 20%? Or exactly 20%? Or something else I have not understood?