SENTENCES,UTTERANCES, PROPOSITIONS

¿WHAT ARE SENTENCES,UTTERANCES, PROPOSITIONS?

1. THE SENTENCES : When these ideas are already ordered placed in words.
2. THE UTTERANCES : Is the sound and how it is said.
3. THE PROPOSITIONS : They are ideas that are in the head where they can be true or false.

EXAMPLE:

1. THE DAY IS COLD

2. They are stupid, we are all stupid 

3.  HELLO, NOT MUCH , OH  GOD