> When an account is CREDITED, this always represents an increase in liabilities[0] (or equivalently, a decrease in assets).
> When an account is DEBITED, this always represents an increase in assets (or equivalently, a decrease in liabilities).
This is where you're wrong. You can credit and debit Accounts Payable and Accounts Receivable. If you credit AP, you're increasing liability, if you credit AR, you're increasing assets.
> When an account is DEBITED, this always represents an increase in assets (or equivalently, a decrease in liabilities).
This is where you're wrong. You can credit and debit Accounts Payable and Accounts Receivable. If you credit AP, you're increasing liability, if you credit AR, you're increasing assets.