Can an Image Spell be disbelieved?

[JohnPaulB]

Originally Posted by Bill_in_IN

There was a great discussion on Discord as to whether Images can be disbelieved. I believe that there was some consensus after the discussion that Images cannot be disbelieved. If this is wrong, please provide your input

I found the authoritive statement on this.

The SpaceGamer #15 Wizard: a designer's introduction by Steve Jackson p 8. Steve gives a description of some foes wasting their time trying to disbelieve a summoned creature.
"Since You (the GM) make the roll for his attempt to disbelieve, he may not catch on right away. (Similarly, you may trick him into trying to disbelieve an image . . . which won't go away until HIT.)"