Interesting question, thanks for sharing the link. From article: "To test this claim, she and her team conducted a study in which they gave participants a word

Interesting question, thanks for sharing the link. From article: "To test this claim, she and her team conducted a study in which they gave participants a word-free logic problem to solve, such as a sudoku puzzle or a bit of algebra. Then, the researchers scanned these folks' brains using an fMRI machine as they worked out the puzzle. The researchers found that the regions of the participants' brains associated with language did not light up as they solved the problems; in other words, they were reasoning without words."