I would like to posit that studying additional Torah for tens of thousands of hours would probably also lead to figuring out at least one minor detail.
For example, were he learning Talmud Yerushshalmi Sotah, and he came across the word “familia” and wasn’t sure if it included non family members of the household or not, he could spend hours studying Latin to figure it out, or hours learning Gemara, and having come across gemaras in Chullin and Sanhedrin using the same term, also figured it out.