The article explores how people detect false sentences by looking at how they process information. The researchers tested if people need to compare a sentence to the correct answer or just notice a mismatch within the sentence itself. They found that when sentences contained concepts that matched the images shown before them, people were better at deciding if the sentences were true or false. However, when the concepts in the sentences did not match the images, people had a harder time detecting falsehood. This suggests that people rely on spotting inconsistencies within the sentence itself to determine if it is false, rather than comparing it to what they know to be true.