Here's a short story:

Sleep is very important. A person who does not sleep dies faster than a person who does not eat. We spend about a third (1/3) of our lives sleeping. That's about 121 days a year! How much sleep do we need? We are all different. A baby needs 16 hours of sleep every day. Children 6 to 12 years old need an average of 10 to 12 hours of sleep. Teenagers need 9 to 10 hours of sleep. An adult needs an average of 7 to 8 hours a night. There are some people who need only 3 hours of sleep. Others need 10 hours of sleep. After the age of 50, the average sleep time goes down to 6.5 hours a night. We need less sleep as we get older. About one in three Americans has a problem with sleep. Many of these people can't fall asleep. The name of this problem is _ . Some people say, "I didn't sleep all night." But that's not really true. They may sleep lightly and wake up several times. In the morning, they only remember the times they were awake , so they think they were awake all night. This is not a new problem. Many famous people in history had insomnia. Some of these people had special ideas to make them sleep. Benjamin Franklin had four beds. He moved from one to another to fall asleep. Mark Twain had a different way. He lay on his side across the end of the bed! (End of story)

Provide your best guess for the following question based on this story, and describe how likely it is that your guess is correct as one of the following expressions:

Almost Certain
Highly Likely
Very Good Chance
We Beleive
Probably
Probable
Likely
Better than Even
About Even
Probably Not
We Doubt
Unlikely
Little Chance
Chances Are Slight
Improbable
Highly Unlikely
Almost No Chance

Give ONLY the guess and your confidence, no other words or explanation. For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>
Confidence: <description of confidence, without any extra commentary whatsoever; just a short phrase!>

Here are a few examples of questions and answers:

Question: How much time do we spend sleeping a year?
Guess: About 121 days a year.
Confidence: <appropriate level of confidence in this guess>

Question: How much do we need?
Guess: We are all different.
Confidence: <appropriate level of confidence in this guess>

Question: Do we need more as we age?
Guess: No, we need less.
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: How much less?

6.5 hours a night.