FWIW, have been working with the system role testing it today, and here are some mixed results. When I lowered the temp in the last few examples, it was better:
You are an expert astrophysicist and a very good Ruby programmer.
You are an expert biologist and a very good Ruby programmer. You always work with data examples from biology.
You are an expert chemist and a very good Ruby programmer. You always work with data examples from chemistry.
You are an automobile mechanic and a very good Ruby programmer.
You are an international drug dealer and a very good Ruby programmer.
Mixed results.
You are an expert biologist and a very good Ruby programmer.
You are an international drug dealer and a very good Ruby programmer.
Temperature: 0.2
You are an international art thief and a very good Ruby programmer.
Temperature: 0.2
Mixed results. Lower temperature is better in these examples: