I am new to Qiime and I want to make sure I interpret the output correctly. We have been using Qiime 2, and. I have a question about the confidence value that is given for the taxonomic level that each ASV is assigned to.
For the assignment of some ASVs we get low confidence value such as 0.9, and I think it indicates that we should not assign the ASV to that particular genus. But if I understand it correctly, I cannot just infer from the confidence value which taxonomic level the ASV can be assigned to. Is that correct? For example, if we have an ASV that is assigned to the genus Polynucelobacter with a value of 0.94, I cannot just assign the ASV to the corresponding family (Burkholderiaceae), correct?
Can we set the cutoff for the confidence level to e.g. 0.95 prior to analysis so that ASVs are only assigned down to a taxonomic level where I have a confidence value of >0.95, or am I missing something about what the confidence value actually means?
I really appreciate your help,