Well, there is contradictory evicence. On the one hand, scientists from ancient times concluded, that the earth is spherical, even more or less calculated its exact diameter. In modern science, the idea of a spherical earth is undisputed, its the general consensus. And for anyone who knows a thing or two about science, science always strives to falsify its own theories, because only thus you can be sure of the theory or hypothesis to be robust.
On the other hand, we have the bible, which states that the earth is a plate.
Based on the evidence above for both sides, it seems like 50/50.