The answer to this is observational learning. It is a form of social-learning theory that supports the idea that our behavior is greatly influenced by our surroundings. In this case, as Lily observes the effect of her sister's action, she was influenced to do the same. This supports the theory that through Lily's observation by watching her sister work, it influenced her to create her own actions.
In logic, arguments aren't described as true, rather, arguments are used to prove the validity of something.
This is called corpus callosum, or callosal commissure.
It is a part of your brain which connects the left with the right hemisphere and affects your entire body as well. Given that the left hemisphere controls the right part of your body (and vice versa), this is all done thanks to the corpus callosum in your brain.
The attitude towards beer in Egypt differed from that in Mesopotamia because there was a calm playful attitude towards beer and being drunk while in Egypt there was a strong disapproval of drunkenness. In both societies beer was a staple and thus necessary in society