Possible Clues:

• ... Friar, too, I found perhaps for more convincing reason
• Old triforia reconstructed, having stronger premises
• With a stronger reason
• A strategic position, or one I entered with greater reason
• All the more, in legal writing
• If orator fails, I can follow with more reason
• With an even stronger reason for a riot, I riot
• With stronger reason
• With a better argument, American Mancini ultimately pens 'keep Moon River'
• Even more certain: Lat.