vis·cous ˈviskəs/Submit adjective 1. having a thick, sticky consistency between solid and liquid; having a high viscosity. "viscous lava" synonyms: glutinous, gelatinous, thick, viscid, mucous, mucoid, mucilaginous, gummy, gluey, adhesive, tacky, adherent, treacly, syrupy
LOL! Maybe they meant “vacuous”. Where the heck are the editors? Laid off?
Give the man a break.
He only has two glaring errors in the first sentence of the article.
Did they measure the viscosity of the attack? Typical lab instrument to use for that is the Brookfield Viscometer.