Research is also key. You can search for news articles, historical records, or personal accounts related to the story. For instance, if 'arn' is set in a particular time period, you can look into historical events during that time to see if there are any similarities. Sometimes, there might be interviews with the people involved in the real - life events that inspired the work. This can help confirm whether it's truly based on a true story.
Another way is to analyze the details in the work itself. If it contains very specific details about a location, a culture, or a situation that are consistent with real - life facts, it's more likely to be based on a true story. For example, if 'arn' mentions real - life organizations, laws, or social phenomena in an accurate way, it could be a sign that it has a basis in reality. However, sometimes fictional elements can be mixed in, so it's important to be cautious and do further research.
One way is to look for official statements from the creators. If they claim it's based on a true story, they might also provide some details about the real - life events or people it's based on.