hard to convince
- stubbornRefusing to change course
- skepticalInclined to question claims
- doubtfulUncertain of truth
- resistantWithstanding external forces
- obstinateFirmly refusing to yield
hardheaded · unmoved · inflexible · cynical · digging in · arms crossed · raised eyebrow · mule · brick wall · immovable · unswayed · defiant · pigheaded · thick-skulled · holdout · naysayer · disbelieving · entrenched
persuadability
hard to convincegullible
Easily deceived
credulous · suggestible · persuadable · impressionable · receptive
mental flexibility
hard to convinceopen-minded
Receptive to different ideas
flexible · adaptable · yielding · willing to listen · persuadable