MedQA Token Dropping vs Word Replacement Comparison:
+------------------+---------------------+-----------------------+
| Strategy         |   Average KL (Prob) |   Average KL (Argmax) |
+==================+=====================+=======================+
| Word Replacement |            0.505603 |               1.60944 |
+------------------+---------------------+-----------------------+
| Token Dropping   |            0.513634 |               1.60944 |
+------------------+---------------------+-----------------------+