Suppose this guy..........

[alepale101]

Suppose this guy I know (ha ha) bottled a beer on Aug. 11 at a FG of 1.013. And suppose this beer had a sour taste when tried three weeks later. If this beer still measures 1.013, is that a sign that it is not infected? It seems to have improved with age. I may let it age another month or more.

 

[Brew_4iT]

If fruit flies got to it probably not... but a lot of people have posted good results by infected batches aging. Maybe had been more of a green beer problem, but you never know. Minus well condition it another month or so wouldn't hurt anything.. besides space for newer batches.

Some people actually like the sour taste and their are some styles meant to be sour.

 

[Walking_Target]

Depends.

If you did a kit that called for 2lbs (1kg) of dextrose or table sugar, you will notice a slightly sour taste to it regardless. It will also taste somewhat thin.

 

[Brew_4iT]

Depends.

If you did a kit that called for 2lbs (1kg) of dextrose or table sugar, you will notice a slightly sour taste to it regardless. It will also taste somewhat thin.

Not always true. One of the 2011 BJCP beer competition winner's had 3 pounds of table sugar in it.

https://www.homebrewtalk.com/f12/devil-may-cry-10-10-10-edition-official-recipe-132569/