When a scientist makes a new discovery, other scientists usually do exactly the same experiment. Why?

1. They want to get part of the credit.

   No. While replicating an experiment is very important, the scientists who do it usually don't get much credit for their work unless they discover an error in the original experiment.

2. Repetition is part of the scientific process.

   No. Repetition is when scientists repeat their own experiment several times, not when other scientists do the same experiment.

3. They think they can make changes to improve the experiment.

   No. By doing exactly the same experiment, they are not changing anything. Instead, they are replicating the experiment as closely as possible.

4. Replication is part of the scientific process.

   Yes. By replicating the experiment, other scientists can help verify that the results are accurate. There is always a possibility that there was some unnoticed influence on the original experiment, and replication can help spot that.

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