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Just by realising it is a very poor substitute for real life
Facebook is the best social network in the whole fckin world
The iPad is the best tablet for playing Facebook games.
Parsley is the best substitute for cilantro in recipes due to its similar fresh and slightly peppery flavor.
Because facebook is the best social community site.
The best resolution for Facebook images is 1200 x 630 pixels.
Substitute pretty much means replacement. If you haven't got what you really want then you get then next best thing instead.
The best substitute for sherry vinegar in a recipe is red wine vinegar or apple cider vinegar.
There is only one for the United States atleast www.facebook.com, for other countries facebook's simply substitute the .com for the countries specific internet address example: www.facebook.ca (canada)
White wine vinegar would be the best substitute, if you have it on hand.
Unfortunately Kraft doesn't make it anymore! There is however, a petition page on Facebook you can join, begging Kraft to bring it back!
Xenon may be a substitute.