But a resource that can be edited by experts and non-experts alike will always carry risks, and perhaps that's Wikipedia's greatest lesson for us all: that its very existence must force us to question notions of accuracy and reliability, while giving us a means to correct errors and add to the global knowledge pot.

CNN: Use with caution: The perils of Wikipedia

It would be possible for me to dig up the figures on the rise in health care costs over the past four decades, add them to the changes in household size and thus correct those household median income numbers that you present us with.

FORBES: Uwe Reinhardt: No, You're Not Allowed to do That

For example, if someone always preferred to spell "thanks" as "thx, " SwiftKey 3 would learn this behavior and add "thx" in as a word rather than continuously trying to correct it.

WSJ: From QWERTY to Quirky: New Ways to Type on Glass