Boron is a known element on Earth. The atomic weight of boron, according to the show, is ten. Colonel Jack O'Neill did not know that, so when this particular puzzle came up on a crossword, his answer was "fat". Carter told him the correct answer was really "ten." (SG1: "Lost City, Part 1")
- The actual atomic weight of boron is 10.811, which even if you're rounding it would go to 11.