Withing the context of emergent behavior theory that would be a valid conclusion I think.... I'm a creationist myself so I have different ideas but, as I said in the earlier comment it would probably be some gnawing behavior due to teeth (but that gets into the discussion of did long growing teeth or gnawing occur first etc.. if you aren't a creationist anyway).

Also I believe rodents aren't the only genus to have long growing teeth or tusks that are maintained by wear and instinct. (which implies potential for parallel evolution or design)