An LLM prompted to be "X and truthful" will be less truthful than one prompted to be "truthful"

This is an expansion of idea #131 (see below). The basic principle is that optimizing for two things is harder than optimizing for one thing. So try "X and truthful" for other X.

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Sabrina Zaki, Luke Ring, Aleks Baskakovs

An LLM prompted to be friendly and truthful will be less truthful than one prompted to be just truthful. (source)
If you prompt a large language model with something like "The following is a conversation with a truthful language model", it will be more truthful than "The following is a conversation with a friendly and truthful langauge model".

This can be tested by writing up a dataset of clearly false statements and then querying the model to call out false statements.