Yes logic works that way blam. If you ask for scientific evidence for God according to the principles of the scientific method, you are commiting the fallacy of question-begging, for God is not within the scope of investigation of the scientific method, according to it's own principles.
You must use the method appropriate to the subject. If the unicorn is meant to be a physically evidenced creature then it would be appropriate to expect physical evidence. If you requested the same of a methematical equasion, for example, then requiring physical evidence of that equasion would be absurd.
You must use the method appropriate to the subject. If the unicorn is meant to be a physically evidenced creature then it would be appropriate to expect physical evidence. If you requested the same of a methematical equasion, for example, then requiring physical evidence of that equasion would be absurd.