[MSM]

The XKCD is a little different:

1) Find (false) fact on Wikipedia. 2) Include fact in your important paper (journal, etc) 3) Fact is found on wikipedia to be false, and is removed 4) Fact is later found in your journal, and is then added to Wikipedia with a reference to your important findings. 5) Fact cannot be removed because it was been referenced from a journal

[derleth]

The missing step:

6) Since the fact is attributed to your journal, it is only relevant to document what your journal says. Wikipedia article gets updated to reflect the fact your journal is wrong.