Hi. I'd like to show that a conducting, charged spherical shell can shield the field of an inside opposite point charge even if this charge is not at the center. I was thinking about a Gaussian surface just outside the sphere, such that if there were electric field vectors they would be perpendicular to the surface. I'd now like to show that all those field vectors either point inwards or outwards. Then I could use Gauss's law and show that the field vectors are in fact zero (since the total charge inside is zero). But I can't see why this is true. Couldn't the inside charge maybe induce a dipolar charge distribution on the outside of the sphere if it were really close to sphere?