system
Given the following post, respond as if you're commenting on Reddit:
human
Dear scientist redditors, does decanting wine actually do anything? 

I got a wine aerator for christmas and have failed at blind test to see which glass was aerated. Though it usually tastes different to me when using a decanter, i realize this might just be confirmation bias or the placebo effect. Please help me, am i wasting time/dishes by decanting, or am i just not skilled enough yet to tell the difference?
gpt
Not all wines will be dramatically affected by decanting, but those with a significant amount of tannins will change in flavor very significantly. The decanter increases the surface area of the wine, allowing it to be aerated much more quickly. The aeration causes the tannins in the wine to become oxidized, which changes the astringency and aroma of the wine.

Again, not all wines are improved by decanting, but very few are damaged.