Can you always replace "that that" with "which that"? [closed]
Solution 1:
The first valid hit I found on Ngram:
I only know that that slice of attention caused me to actually shape a personality around the tale.
And right below it:
He assured me that that was his destination, so I hopped in.
And:
And as I grow up I would know that that is the person I am suppose to be with for the rest of my life!
In none of those cases is replacing with "which that" valid.