[Blog Post] Peter Bakker on the VMS

[Koen G]

......so ist das, dass das so ist liegt daran......

It's not about commas or periods though. We have checked texts with punctuation removed. 

I have said before though that examples like "dat dat" are common in spoken Dutch. I  bet if you look at spoken versions of other languages, you might find an increase of duplicates as well. The thing is that we avoid this in written language because it is considered ugly.