No, it isn't entirely possible(any more than anything else is
technically possible). In the rolling stone article:
> "Clapper agreed with Gistaro, telling Helgerson, “Trump doesn’t read much; he likes bullets.” Instead, during the Trump administration, the briefer would summarize aloud key points since the last briefing and provide three documents (none more than a page) about new developments abroad. This was all part of an effort to make the PDB “shorter and tighter, with declarative sentences and no feature-length pieces.”
> “Trump had his own way of receiving intelligence information—and a uniquely rough way of dealing publicly with the IC,” Helgerson wrote, “but it was a system in which he digested the key points offered by the briefers, asked questions, engaged in discussion, made his own priority interests known, and used the information as a basis for discussions with his policy advisers.”"
> "These and other difficulties agencies encountered under Trump led Helgerson to conclude that, “The system worked, but it struggled.”"
He clearly had access to more information than any civilian, and was engaging with it.