I would personally rather stop and look a little silly than go, cock the identification of the problem up and look dead.
That is why it is prudent to check the ground speed during the take off if you have a suspicion that one of the ASI's is giving erroneous information. The Boeing FCTM mentions that. If all else fails, then rather than doing a high speed reject it is better for everyone concerned to continue the take off and rotate on the ground speed indication with wind adjustment of course. Then sort out the problem at your leisure in the air. This is where simulator practice comes into play.