And it occurred to me that there's probably nothing unusual about that. I probably have done this before.
I'm sitting in front of my computer, which is in exactly the same spot in my office it always is. I have read this same blog in the past, and it has a reasonably distinct typeface and layout; the post even follows a pattern the author has used before. I have streaming trance music playing, and since there's not an infinite supply of it, and they stream music 24/7/365, some songs (especially the popular ones) get repeated. All the environmental cues are saying "you've done this before!"
So, yeah. I guess this time it's just memory, and not some false sensation of memory due to random brainwave fluctuations.
The one thing I can't decide is: Is that more or less weird than actual deja vu?