While writing my first non-provisional patent application, I came across a Medium article that claims that the "Brief Summary of the Invention" is not actually required and that it could be a mistake to include it. Here is the relevant section of the article, found here:
In truth, you do not need to have a summary of the invention. The US Patent Law, America Invents Act 35 U.S.C. §101 et seq., does not require a “Summary of the Invention” section nor does 37 C.F.R. 1.73, which states “A brief summary of the invention indicating its nature and substance, which may include a statement of the object of the invention, should precede the detailed description. Such summary should, when set forth, be commensurate with the invention as claimed and any object recited should be that of the invention as claimed. (all emphasis added)” “May” and “should” are different than “must” or “shall,” and, as such, indicate these are not a requirement but, instead, are a mere option. This is reinforced by the phrase “when set forth,” which means that it need not be set forth. See also MPEP 608.01(d) (also using optional “should” rather than obligatory “must”). If an Examiner attempts to require a “Summary of the Invention” section, gently remind them that there is no requirement and politely demur.
I don't know if I really buy this argument, considering that I have yet to come across any other articles claiming the same or any granted patents without a summary section, but the argument that the article makes does seem to make sense. Is this true?