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Github this month is very close to having 0 9s reliability. (unless they want to argue that 89% has a 9 in it)

The comment you are replying is carefully written in a way that allows 23.19%

I'm not sure I've had a day without Github hiccups this month, so that feels right.

There is always 88.9% or 88.89%

By now, I'm nearly certain that they'd be down to 0 9s of uptime if they counted it conservatively.

Or as the British would say "9 innit ?"