Does underdetermination pose a challenge for quantum gravity?

The problem of the underdetermination of theory by evidence has received quite a lot of attention from philosophers of science, ever since it was first brought to attention by Pierre Duhem in 1914. Physicists however have in general largely ignored this issue. In this talk, I will give a very brief overview of underdetermination and how it has been conceived by philosophers, and then argue why physicists should take this issue very seriously when constructing and evaluating any theory of quantum gravity or physics at the Planck scale.