If you say you intend to give someone the benefit of the doubt it means you intend to accept that something or someone is true or has honest intentions when there is no evidence to suggest otherwise. If you give someone 'the benefit of the doubt' you intend to trust someone until they are proven wrong even if you have doubts. This is an idiom used in both social and professional contexts.

1. There may be a good reason why Adam wasn't here tonight, so let's give him the benefit of the doubt rather than criticizing him for not showing up.
2. Paul insisted that it wasn't him who took my money. I wasn't sure if he was telling the truth, but I gave him the benefit of the doubt.

1. Even though the journalist was accused of fabricating a story, I was willing to give her the benefit of the doubt because I've worked with her long enough to know that she would never deliberately do such a thing.