YOU SAID:
i am the coolest person in the whole world i guess
INTO JAPANESE
私は全世界で最もクールな人だと思う
BACK INTO ENGLISH
I am the coolest person in the world
INTO JAPANESE
私は世界で最もクールな人です
BACK INTO ENGLISH
I am the coolest person in the world
That didn't even make that much sense in English.