[obfuscate]

"Now I have another very important point to make. Errors in base pairing, also known as mutations- are usually very very good. Why? Because 1/3 of errors are bad, 1/3 do absolutely nothing, and 1/3 are good and provide benefits. That means 2/3 of the time- mutations do nothing or help the organism."

This is the same sort of reasoning as "either I win the lottery or I don't, so there's a 50% chance". More mutations are neutral, than harmful, than beneficial.