Why is it that bestiaries seem to treat any encounter between two specific beafts as a foregone conclusion? The thing with the elephant and dragon always has the elephant winning, and (though I don't remember exactly what) the method of winning is treated like it's always the same.
It’s a morally improving allegory thing. Medieval bestiaries were very much intended to teach lessons about christian values, with the beafts standing in for The Soul or Sin or similar. So it pretty much had to be a foregone conclusion or the subtext would end up like, “Well, it depends on how much rest the soul’s been getting. Is the ground wet? Is the sun in its eyes? Evil can sneak up on you if the sun’s in your eyes. Also how’s the terrain? The soul’s speed advantage is no good on uneven terrain.”