Strange sentences.

What is strange about these sentences? 

                                           Was it a car or a cat I saw?    

                                           Warsaw was raw. 
                                          No lemons, no melon. 
                                         Dennis and Edna sinned. 

They are all palindromes. A palindrome is a word, phrase or number that reads exactly the same backwards as forwards. The name "palindrome" comes from the Greek palindromos meaning "running back again".   

      

These sentences are also a little strange. Why? 

                                      Women understand men; few men understand women. 

                                      Bores are people that say that people are bores. 

                                     Eat to live; never live to eat.

                                     All for one and one for all.
                     You can cage a swallow, can't you, but you can't swallow a cage, can you?

They are all word-unit palindromes. Word-unit palindromes relate to whole words, which form the same sentence when read in reverse as forwards.