| 100% | LIAR | 4 | "That's not true and you know it!" |
| 68% | LIES | 4 | "That's all false, and you know it!" |
| 65% | ALIE | 4 | "That's ___ and you know it!" |
| 65% | ALIE | 4 | "That's ___, and you know it!" |
| 61% | LIAR | 4 | "You know that's not true!" |
| 55% | MILLI | 5 | __ Vanilli, duo who "sang" Girl You Know It's True |
| 53% | SCIENCE | 7 | Something that's "true whether or not you believe in it," per Neil deGrasse Tyson |
| 50% | YOUDBESETONSTUNNING | 19 | "I know it's not my business, but if you were a laser ..." |
| 50% | SKIP | 4 | How do you know it's almost Leap Day? "When it is only a hop, ___, and jump away" |
| 49% | LIE | 3 | That's not true |
| 49% | ARLO | 4 | Name that becomes another name if you put it between C and S |
| 48% | HUMERUS | 7 | Long arm bone that's not funny when you hit it |
| 47% | SCIENCE | 7 | "It's true whether or not you believe in it," per Neil deGrasse Tyson |
| 47% | FACT | 4 | Something known to be true, whether you believe it or not |
| 47% | IDEA | 4 | “You know, that’s not a terrible ___” |
| 47% | CHARLOTTESWEB | 13 | Children's classic with the line "It is not often that someone comes along who is a true friend and a good writer" |
| 46% | KID | 3 | "I ___ you not!" ("It's true!") |
| 46% | DUH | 3 | "How do you not know that!" |
| 46% | LIE | 3 | "You ___!" ("That's not true!") |
| 46% | LIE | 3 | Something that's not true |
| 46% | ASITWAS | 7 | Harry Styles hit with the lyric "You know it's not the same ..." |
| 46% | APOET | 5 | "You're ___ and you didn't even know it!" |
| 45% | BOTH | 4 | "It is not often that someone comes along who is a true friend and a good writer. Charlotte was ___," famous last line of "Charlotte's Web" |
| 45% | DUH | 3 | "How could you not have known that?!" |
| 45% | CLAP | 4 | "If you're happy and you know it, ___ your hands" |
| 45% | CLAP | 4 | "If you're happy and you know it, ___ your hands..." |
| 45% | SNAP | 4 | "If you're happy and you know it, ___ your fingers!" |
| 45% | ABOVEMYPAYGRADE | 15 | "That's why you get the big bucks and not me" |
| 45% | LIE | 3 | Say something that's not true |
| 44% | HAPPY | 5 | If you're this and you know it, clap your hands |