Update readme

README.md

@@ -12,12 +12,13 @@ word list and the encode/decode algorithms, and both function identically.
 Features
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-* The words can be input in any order without affecting the output coordinates
-* Accurate to 12 meters or better
-* The first two words of a phrase (when the words are ordered alphabetically) are sufficient to locate
-a large city (accuracy of at least 11.1km)
-* The first three words are sufficient to locate a neighborhood (accuracy of at least 1.1km)
-* All four words pinpoint a location to an accuracy of at least 11 meters.
+* Every phrase corresponds to just one point on Earth
+* Words can be input in any order without affecting the output coordinates
+* Accurate to 11 meters when a full phrase is used
+* Partial phrases can be used, with lower accuracy:
+    * The first two words of a phrase (when the words are ordered alphabetically) are sufficient to locate a large city (accuracy of at least 11.1km)
+    * The first three words are sufficient to locate a neighborhood (accuracy of at least 1.1km)
+    * All four words pinpoint a location to an accuracy of at least 11 meters.
 
 
 How it Works