Endosomal fusion upon SNARE knockdown is maintained by residual SNARE activity and enhanced docking.
Bethani I, Werner A, Kadian C, Geumann U, Jahn R, Rizzoli SO, Traffic, 2009 Oct - link

SNARE function is not involved in early endosome docking.
Geumann U, Barysch SV, Hoopmann P, Jahn R, Rizzoli SO, Mol Biol Cell, 2008 Dec - link