The example used in the link you provided mention Nixon. He was indeed pardoned without naming specific crimes. They were pretty obvious though since he was in the middle of an impeachment. The thing is, they were never actually tested so there (to my knowledge) isn’t any case law backing up that assertion.
perplexity ai's sources disagree with Tom :(
Can a US president issue a blanket pardon without mentioning a crime?
( Link is not permanent -- if it's gone, just ask it again yourself )
The example used in the link you provided mention Nixon. He was indeed pardoned without naming specific crimes. They were pretty obvious though since he was in the middle of an impeachment. The thing is, they were never actually tested so there (to my knowledge) isn’t any case law backing up that assertion.