-considered almost equal. Also, the general quality of the larger
-dictionaries may also be less as they are not as carefully checked for
-errors as the normal dictionaries.
+considered almost equal. The larger dictionaries however (1) have not
+been as carefully checked for errors as the normal dictionaries and
+thus may contain misspelled or invalid words; and (2) contain
+uncommon, yet valid, words that might cause problems as they are
+likely to be misspellings of more common words (for example, "ort" and
+"calender").