Which sentence states a fact?
In the Middle Ages, knights rode horses and wore armor made of metal. Knights during the Middle Ages were really just bullies on horseback.
A fact is something that can be proved to be true. Facts can be proved by observing, measuring, or studying information.
The flag of the United States has 13 stripes.
This is a fact. It can be proved by looking at the flag and counting the number of stripes.
An opinion is something that a person believes, thinks, or feels. An opinion cannot be proved true.
The flag of the United States is easy to draw.
This is an opinion. People may have different opinions about what makes a flag "easy" to draw.
The first sentence states a fact.
In the Middle Ages, knights rode horses and wore armor made of metal.
It can be proved by reading a book about knights.
The second sentence states an opinion.
Knights during the Middle Ages were really just bullies on horseback.
Bully shows what a person believes, thinks, or feels. Another person might have a different opinion about whether knights were bullies.