Teodoro A. Agoncillo was a historian who did not suffer fools lightly. He did not respect opinions that were erroneous or stupid...

Teodoro A. Agoncillo was a historian who did not suffer fools lightly. He did not respect opinions that were erroneous or stupid, neither did he endure them. Agoncillo called them out and corrected them. If he were alive he would give the trolls and flat-earthers hell!
One of thrills of library research is finding out marginalia from previous readers who reacted to the text by writing on the margins. In this case we see Agoncillo correcting an error in a book on the Philippine flag. Thanks ...