It can be refuted that it does not constitute infringement of patent rights. This can be proved by proving that your product or service is obviously different from the patentee's patent, you can't make the patentee's patent logo obvious, and you have reached an agreement with the patentee.
Accusations can be refuted, and only invalid patents can be solved. There are many reasons why patents are invalid, such as the lack of novelty and obviousness in the scope of infringement, the conventional technology in non-professional technical fields, the insufficient description of patents and so on.