illusionary

In short, their arguments are illusionary in proportion as they themselves value them.

In this sentence there is expressed full knowledge of the illusionary nature of the lower personality.

One can never hope to surpass the illusionary appearance of a tableau vivant.

What is it in this world that we love to believe real is not illusionary,—the question of duration being the only difference?

All were as transitory as smoke, as illusionary as the opium-eater's mid-day dream.