![One transsexual Doctor too many](https://i2i.org/wp-content/uploads/2017/08/doctor-who-7-330x242.jpg)
Each time you flip a coin there is a 50-50 chance it will land heads-up. But the chances of it landing heads two times in a row are 1-in-4. Three times in a row is 1-in-8, and so on. The chances of it landing heads-up 13 times in a row are a whopping 1-in-8,192. And
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