or otherwise
Or something that is starkly different or contrasting (compared to something else). Do whatever it takes to convince him to sell—legal or otherwise. We accept all forms of payment, cash or otherwise.
know otherwise
To understand or be certain that a particular statement or assertion is unfounded or incorrect. There's a common perception that being a stay-at-home parent is the easy option, but I know otherwise.
know ˈdifferent/ˈotherwise
(informal) have more information about something: She thought he was upset about the divorce, but I knew different.or ˈotherwise
used to refer to something that is different from or the opposite of what has just been mentioned: It was necessary to discover the truth or otherwise of these statements.We insure against all damage, accidental or otherwise.