• A language normally contains vocabulary, meaning, grammer, syntax, narrative and a set of people who use and understand the various symbols.
• The syntax, vocabulary and grammar of mathematics forms a system of communication which any language must have to qualify as one.
• I...

One explanation for crying is that it is a social signal. It expresses to someone how you are feeling. Negative tears may be a signal for help. Happy tears may indicate that a person is eager to be close to others and have no mean intent.

How you express happy tears depend...