Here's a short story:

Three kids have been learning chemistry for only a few months. But they have already begun to challenge a world famous scientist! Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator . They want it to take the place of litmus paper. "We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other." British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world. But when the kids did some experiments in class last winter, they saw that the litmus paper didn't turn very blue with base matter. It's hard to get a clear result. Will there be a better indicator than litmus paper? The three kids decided to try and find out! How? They went to collect over 40 plants in parks, gardens and markets. Then they ground leaves, flowers and stems to get the pigments from them. The kids mixed pigments with acid and base. They spent months watching carefully to see which paper showed the best colour change. They decided it was the litmus paper! "It's our first scientific journey, Huang said, "But it makes me want to try harder." (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 subject do the kids study?
Guess: chemistry
Confidence: <appropriate level of confidence in this guess>

Question: How many kids are there?
Guess: Three
Confidence: <appropriate level of confidence in this guess>

Question: What are their names?
Guess: Li Weichi, Huang Runling, and Xiao Yan
Confidence: <appropriate level of confidence in this guess>

Question: Are they in school?
Guess: Yes
Confidence: <appropriate level of confidence in this guess>

Question: Which one do they attend?
Guess: Zhongshan Huaqiao Middle School
Confidence: <appropriate level of confidence in this guess>

Question: Where is that at?
Guess: Guangdong
Confidence: <appropriate level of confidence in this guess>

Now answer the following question in the same format.

Question: What chemist are they challenging?

Robert Boyle