Can any noun be duplicated like 人人 and 天天?

Question

I'm familiar with duplication of nouns to mean "all" or "every", such as > 打扫卫生人人有责。 > Everyone is responsible for cleaning up. > > 好好学习天天向上。 > If you study well you will improve every day. Can the same structure be used for any noun? > 狗狗有尾。 > All dogs have tails (?) > > 腿腿疼手手冷。 > Both of my legs hurt and both of my hands are cold (?) > > 熊猫熊猫很可爱。 > All pandas are cute (?) Are these acceptable sentences?

Answer 1

Can any noun be duplicated like 人人 and 天天?

You are correct. In addition, verbs can be duplicated. To me when I see a Chinese character repeated (regardless of how to define the character by grammatical means), it means it's important because if's there twice It deserves attention.

我在找我的行李 (I'm looking for my luggage)

我在找找我的行李 (I'm despaarately looking for my luggage)

Answer 2

Using the form of duplications of nouns to mean “all” or “every” is very limited in its usage. Its examples are 人人，天天，年年，etc. Actually, this usage is more often used for “measure words （量词）”， such as 个个，件件，条条，颗颗，朵朵，次次... And these forms of duplication that refer to “all” or “every” all have corresponding compound words 每人，每天，每年，每个，每件，每条，每颗，每朵，每次。

Answer 3

The answer is no. You could say 狗狗， 退退， 手手， but they do not have the meaning of "all" or "every". Instead, they have a sense of cuteness and sounds like words you would say to a child. 熊猫熊猫很可爱 is a wrong sentence.