If a writer could persuade you that all these things were true, you'd probably be much more open to believing that little green men are at least up to something at NASA. That's the power of evidence.
Evidence and Relevance
It's not always enough to just bring up a lot of facts, though. You also have to connect them to your main argument. Don't rely on the reader to figure this out for herself - at best, it's frustrating, and at worst, she'll totally miss your point.
For example, what if you read this: 'Aliens have infiltrated NASA. We know this because chemical scans revealed dust with a high concentration of the mineral anorthite inside the building.'
You probably wouldn't be very convinced, right? What does anorthite have to do with aliens and NASA? It's not convincing evidence because you have no idea how it's relevant. This evidence isn't likely to persuade you of anything.
But what if the author went on to tell you that anorthite is rare on Earth, but rocks from the moon often have a high concentration of it? So if there's a bunch of anorthite dust in the building, it's probably a sign that something from the surface of the moon got in there. Now that's a lot more persuasive, right?
In your own papers, you need to explain how your evidence is relevant to what you're trying to argue. Don't leave your readers to work out the connection independently; remember that even if it's clear to you, it might not be clear to someone else.
You also need to present the reader with evidence that's appropriate for the field you're writing in. For example, in a scientific paper about teenage intellectual development, you wouldn't bring up a story about walking your dog as evidence, but in an argument with your parents about how responsible you are, it might be perfectly legitimate.
Lesson Summary
In this lesson, you learned about using evidence to support your arguments. This is an essential part of convincing your audience - very few people are going to believe what you say just because you say it. You'll have to use examples, facts, statistics, and other evidence to support your point. And if there's any doubt how the evidence is relevant to your argument, remember to always explain how they're connected - even if it's obvious to you, it might not always be obvious to your readers. As for those aliens, though, they're totally fictional - well, unless you have any evidence to prove otherwise.
Learning Outcomes