There is something unique about this sentence- other than being really hard to understand!.
Can you figure it out?
“I do not know where family doctors acquired illegibly perplexing handwriting nevertheless, extraordinary pharmaceutical intellectuality counterbalancing indecipherability, transcendentalizes intercommunications incomprehensibleness”.
Will give you until Wednesday to decipher it 
The number of letters in each word goes up by one.
I – 1
do – 2
not – 3
know – 4
…
incomprehensibleness – 20
I
do
not
know
where
family
doctors
acquired
illegibly
perplexing
handwriting;
nevertheless,
extraordinary
pharmaceutical
intellectuality
counterbalancing
indecipherability,
transcendentalizes
intercommunications
incomprehensibleness.
I think you forgot a semi-colon in there. Remember reading this on bash.org so many years ago…
Just realized that it doesn’t look super good with this font, but if you use a console type font (copy/paste what I did into notepad), you can see that each word is 1 character longer than the previous one. And, it looks really cool!
The Nth word has N letters.
The number of letters that compose each word increases from 1 to 20(i.e. I-1 do-2 not-3 … incomprehensibleness -20).
Each word has one more letter than the one before.
Words start with one letter, two, three …on up to twenty letters.
very neat, indeed !
Each word is one letter longer than the last.
each word has one more letter than the previous word
Each word has one more letter than the one before it
each words increase in length by one letter
the sentence begins with a 1 letter word then 2 then 3 etc…untill a 20 letter word.
The number of letters in each word increases by 1 with each word from 1 to 20 letters
Each word of the sentence is one letter longer than the previous word.
The number of letters in each word increase by one in the sentence. There are 20 letters in the 20th word.
Scott
In this sentence the length of every successive word increases by a letter.
1ST WORD ….1 LETTER
2ND WORD …..2 LETTERS
…
….
…
IT GOES ON LIKE THIS.
very good!
The n-th word has n letters, where n = 1, 2, 3…19, 20.
Isn’t it called something like an incremental sentence?
Having had the first glance at this puzzle right now, and read all the comments above, I can safely say that the n-th word has n letters