  By analyzing the singularity of standard intertwining operators, we provide a
new way to understand the explicit location of reducibility points of induced
representations of two Speh representations for general linear groups over a
p-adic field. Through playing with this toy example, it seems that the analytic
approach, in the spirit of M{\oe}glin--Waldspurger, could play a role for
analogous reducibility problems in the setting of classical groups. On the
other hand, it also stimulates the arising of some interesting questions.
