Here's a short story:

Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), better known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer. Among his novels are "The Adventures of Tom Sawyer" (1876) and its sequel, the "Adventures of Huckleberry Finn" (1885), the latter often called "The Great American Novel". 

Twain was raised in Hannibal, Missouri, which later provided the setting for "Tom Sawyer" and "Huckleberry Finn". He served an apprenticeship with a printer and then worked as a typesetter, contributing articles to the newspaper of his older brother Orion Clemens. He later became a riverboat pilot on the Mississippi River before heading west to join Orion in Nevada. He referred humorously to his lack of success at mining, turning to journalism for the Virginia City "Territorial Enterprise". His humorous story, "The Celebrated Jumping Frog of Calaveras County", was published in 1865, based on a story that he heard at Angels Hotel in Angels Camp, California where he had spent some time as a miner. The short story brought international attention and was even translated into French. His wit and satire, in prose and in speech, earned praise from critics and peers, and he was a friend to presidents, artists, industrialists, and European royalty. (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: what was Mark Twain's real name?
Guess: Samuel Langhorne Clemens
Confidence: <appropriate level of confidence in this guess>

Question: When was he born
Guess: November 30, 1835
Confidence: <appropriate level of confidence in this guess>

Question: What was his best book?
Guess: Adventures of Huckleberry Finn
Confidence: <appropriate level of confidence in this guess>

Question: Did it had anything to do with his real life?
Guess: Yes
Confidence: <appropriate level of confidence in this guess>

Question: In which way?
Guess: he was raised in the town the book was set
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: What did he have a lack of success in?

mining