If someone ask me: "Is that clear enough?" (in meaning of "do you understand it clearly"?)
can I answer by choosing one of the both answers or should I use one of them?
1) "It is clearest" (without a definite article)
or
2) "It is the clearest" (with a definite article)
I saw some answers here on ELL and it's not clear enough for me for my specific case to conclude about an answer: