[quote=thewizardguy]
Zerg are linked through a Hive Mind, which is, in fact, a chemical system, not a psychic system. Much like ants, they communicate through a system of fast-working chemicals. For example, in Starcraft, Raynor is tasked with placing a special beacon in a trapped area that would draw the Zerg through method of 'special Zerg pheromones'.
[/quote]

while we're on the subject of plot holes in the sc2 universe. if that was so then why did they need kerrigan to be highly psychicly gifted in order to convert her?