The speaker says an auditor checks evidence, such as screenshots or code, to verify that a required groundness filter exists; this check does not establish whether the filter is effective.

“they're kind of more traditional standard type stuff so in this particular instance we just check whether they in fact have a grounders filter so we will partner with an auditor so we partner with auditors like kpmg or like shellman who go in and do the thing auditors do which is to check the evidence in this case that might be a screenshot it might be a part of the code that they need to review to see that it actually just that it exists and then”