They can try to forecast the odds, but they can’t guarantee them. They use terms like “germline mosaicism,” “chromosome rearrangement,” or “delayed mutation” to explain why their science is not an exact science. I actually like how doctors talk. I like the sound of science. I like how words you don’t understand explain things you can’t understand. There are countless people under words like “germline mosaicism,” “chromosome rearrangement,” or “delayed mutation.” Countless.