In Present perfect^x, Whom^x, Numbers^x

Hello Sextus Here you go: 1) “The past few years have witnessed the publication of a considerable number of books and papers on the influence that ancient scepticism (broadly defined) . I don’t understand whether by adding “an” before “assimilation”, the sentence is correct, or whether I...

Hello Pedanticus. Here are some doubts: 1) “The past few years have witnessed the publication of a considerable number of books and papers on the influence that ancient scepticism (broadly defined) . I don’t understand whether by adding “an” before “assimilation”, the sentence is correct, or...