[ineedasername]

>"Even a broken clock is right two times per day."

That is incorrect. There are any number of ways in which a clock might be broken such that its hands are not in the correct position even once per day.

[gmac]

Not incorrect so much as underspecified?

The phrase more commonly starts with a ‘stopped’ clock, which works more clearly.

[onewheeltom]

Should be “a stopped clock is right twice a day”