The difference between manners and morals is that the former are necessarily social in nature whereas the latter are not necessarily social in nature. ██ ███ █████ ██ █████████ ██ ███ █████ ████ ███ ██ ██████
Morals and manners are different: manners are necessarily social in nature, whereas morals are not necessarily social in nature. Therefore, according to the stimulus, the rules of etiquette do not apply when someone is alone.
If a situation involves etiquette, then that situation involves manners.
If a situation is social, then a person in that situation cannot be alone.
There are some situations involving morality that are not social in nature.
The statements above, if true, ████ ████████ ███████ █████ ███ ██ ███ █████████ ███████████
One could be ███████ ███████ ████ ██████ ██████ ███ █████ ██████ ███ █████
No immoral act █████ ██ █ █████████ ██ ███ █████ ██ ██████████
The rules of ████████ █████ ████ ████ ███ ██ ██████
It is more █████████ ██ ██ █████ ████ ██ ████ ████ ████████
What is social ██ ██████ █████ ███ ██ █ ██████ ██ █████████