cogitable (adjective) thinkable: believable, feasible
Sinonime: adroit, artful,
astute, cagey, calculating,
canny, crazy like fox, cunning, deceitful,
deep, designing,
devious,
disingenuous, duplicitous, foxy*,
fraudulent, guileful, insidious,
intelligent,
keen,
knowing,
sharp,
shrewd,
slick,
slippery*, sly,
smart,
smooth, street smart, streetwise,
subtle, tricky, vulpine, wily
Antonime: honest, naive, unclever