Nice try with the straw man argument. Nobody here is claiming the document is forged. The question is whether it matters or not. POTUS took advantage of student deferments which were available back then. Nothing illegal. Whether student deferments should or shouldn’t have been allowed is a separate issue, but regardless, to apply for one was completely legal, and unlike some who back then enrolled in college just to get some useless degree to avoid the draft, Trump’s degree was directly pertinent to his chosen career path.
Fortunately, he was banned long ago.