The famous poem of Dr. Jose Rizal, Sa Aking mga Kababata became the subject of scrutiny of some scholars. To some scholars of Philippine history, it is impossible that Rizal wrote the poem when he was just eight years old. The argument is Rizal did not know the word Kalayaan at the time the poem was said to have been written. As a proof, Rizal's letter to his brother Paciano stated that he had difficulties in finding the appropriate word that would fit to the German concept of Freiheit. Rizal could not simply equate the term to Tagalog word of Kaligtasan. It is argued that Rizal encountered the term Kalayaan from Del Pilar's translation of his essay Amor Patrio. What type of criticism is this?