note: EL implicit obects are not the same as the implicit objects available to JSP scripting except for page context?
Can you please enter full paragraph here. The EL implicit objects are really different from JSP scripting objects. The JSP scripting objets are page, application, request, response, session etc. are objects of their respective types.
The Implicit objects used in EL like requestScope, sessionScope etc ate not a Objects of HttpServletRequest or HttpSession types, but these are the Maps of key/value pairs in the respective scope. Only the pageContext object in the EL is same as the pageContext object in JSP scripting.