I visited my doctor for discharge summary and asked her if she could pinpoint the cause of the cancer. when she started to speak, she was lost in search of a word that would fit in the blank in the following sentence: your cancer might be because of this virus but nobody yet has put a _____ on it.
she was lost and so was I. usually when we buy a product, there is a seal on it that suggests authenticity. I am looking for a word that could mean a seal or mark that proves something is authentic. In this case, it would confirm that the cause of the disease is X.
Is there a word that would suitably fill in the blank spot?