Board Thread:False Info and Speculative Discussion/@comment-5379216-20140705054016/@comment-5379216-20160724222810

Something that's very interesting and also worth mentioning is the fact that Derek and Kate might've been in a relationship for about 3 years.

Going with the dates found in my original post and with what we've learned in Season 4, that's the only logical explanation.

During Season 4, we learned that Derek and Kate where in a relationship when he was 15 (in 2002).

The Hale House fire happened in 2005.

2005 - 2002 = 3