Atoms can be numbers, strings, or identifiers that are coerced to their appropriate type for the oprator using them.
Atoms may be quoted with single (') or double (") quotes. They can also be an unquoted sequence of letters, digits, and
underscore characters. All atoms are considered the same type, regardless of how they're declared. Additionally, atoms are considered
case-insensitive for comparisons, which means that the strings "True" and 'true' are identical to the identifier
(despite the presence of quotes and differences in case).