These are called things. Humans use them to define themselves.

you can define me. I like comics. writing. writers. trainers. films. 

I can define you. you like loud music. films. clothes. 

I'm pretty sure that's how it works. 

she smiles and says my favourite film is stranger than paradise. his mind works carefully, deciding whether it's safe to pretend that he knows of this film or not. humans scheme. it's second nature. 

Sentient beings are so complex.