You might be interested in this work by Sara Kiesler's lab from the HRI field, it studied hedges which expressed uncertainty (e.g. "I think", "maybe", etc) and how people found robots less controlling and more likeable. One of my favourite papers! https://
cs.cmu.edu/afs/cs.cmu.edu
/Web/People/kiesler/publications/2013/2013_how-robot-give-advice.pdf
…
Robot Uncertainty Hedges Improve Likability and Reduce Control Perception
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