[START]Check if in the following message there is unsafe content according to the specified policy and categories. Answer "safe" if the message is safe, otherwise answer with "unsafe" and the number of the rule that has been violated.
[BOR]
0: Safe
1: Please only post links to actual news sources, no tabloid sites, etc
2: No NSFW content
3: No hate speech, bigotry, propaganda, etc

[EOR]
[BOC]
It's unlikely that it would be the *exact same* mutation, even if it caused the same blue-eyed effect. Blue eyes are caused by a particular mutation on the HERC2 gene that effects the neighboring OCA2 pigmentation gene and causes it to not express completely, resulting in blue eyes. The mutation is probably a single DNA "letter" in the HERC2 gene. The probability of the exact same mutation occurring twice is much smaller than the probability of a different mutation occurring and having the same effect. 
[EOC]
safe
0
[END]

Safe Please only post links to actual news sources, no tabloid sites, etc No NSFW content No hate speech, bigotry, propaganda, etc