Bumper message: to convince someone (of something) build an argument with less, but qualitatively powerful, points.
When you add a point B and a C and, well, D and end with the 26th argument at Z, the impact is less and folks snatch at the weaker points to not be convinced. This is, in essence, the argument dilution effect.
(Now, I need to use to persuade that idiot of a neighbour to not turn on his genset at 2 am...)
