Update README.md

README.md

@@ -209,7 +209,7 @@ Next, we see that "`.`" and "`?`" are exactly the same, because w.r.t. SBD these
 (Though, we may expect some difference between these tokens, given that "`.`" is predicted after abbreviations, e.g., 'Mr.', that are not full stops.)
 
 Further, we see that "`.`" and "`?`" are exactly the opposite of `NULL`. 
-This is expected since these tokens typically imply sentence boundaries, whereas `NULL` and "`,`" do not.
+This is expected since these tokens typically imply sentence boundaries, whereas `NULL` and "`,`" never do.
 
 Lastly, we see that `ACRONYM` is very, but not totally, similar to the full stops "`.`" and "`?`",
 and almost, but not totally, the opposite of `NULL` and "`,`".