YOU SAID:
There are only two kinds of people in this world: those who believe there are only two kinds of people in this world, and those who know better.
INTO JAPANESE
この世界には2つの種類の人しかいません。この世界には2つの種類の人がいると信じている人と、よりよく知っている人があります。
BACK INTO ENGLISH
There are only two kinds of people in this world. There are people who believe that there are two kinds of people in this world and people who know better.
INTO JAPANESE
この世界には2種類の人しかいません。この世には二種類の人がいると思う人がいます。
BACK INTO ENGLISH
There are only two kinds of people in this world. There are people who think that there are two kinds of people in this world.
INTO JAPANESE
この世界には2種類の人しかいません。この世には二種類の人がいると思う人がいます。
BACK INTO ENGLISH
There are only two kinds of people in this world. There are people who think that there are two kinds of people in this world.
That didn't even make that much sense in English.