F of C could be four for at least one C, not in this interval. Remember, the C is our X. This is our X right over here. So the C is going to be in this interval. I'll take a look at it visually in a second so that we can validate that. We're not saying for at least one C between three and six, f of C is equal to four. We're saying for at least one C in this interval, f of C is going to be equal to four.