Not all discrimination is prohibited by law. For example, employers routinely discriminate between potential employees based upon education or experience.
Other types of discrimination are subtler, but still legal. For example, some employers discriminate between potential employees based upon personal characteristics such as weight or attractiveness.
Should employers be permitted to discriminate based upon attractiveness?
Take a side and argue that an employer should or should not be permitted by law to discriminate against persons who are not attractive.