About 10 years ago I tore my ACL (anterior cruciate ligament) and the doctor said that I won't be skiing, playing tennis, running, or any similar activity again. After about 6 months, my knee healed and I have been skiing, playing tennis, running, and doing many other similar activities since. Now I could claim that God healed me, that my perseverance overcame all odds, that my positive thinking made this happen, or that it was the vitamin supplements I was taking, but there is a much more likely explanation: the doctor was simply wrong.
Misdiagnoses are extremely common for all types of conditions. Even DNA testing that is said to be 100% accurate is wrong 1% of the time because of screw ups in the lab (the test itself is 100% but the process is prone to error). We like to be the subject of a miracle story, so we often overlook the obvious in favor of the miraculous or even just inspirational.
The next time your doctor tells you that you will most likely never ______ again, and a few weeks later you are ______ing, remember Occam's Razor—your doctor probably just screwed up.