Rav Avigdor Miller On Eilu V’eilu Divrei Elokim Chayim

Q: When Chazal argue about a historical fact, for example the size of the mizbei’ach, and only one can be truly right, how are we to understand the concept of “Eilu V’eilu Divrei Elokim Chayim (Eiruvin 13a)?