"What, is it that interesting?"

"Hehehe... You betcha!"

"Weeping Cherry, she is a Daemon!!!"

"Uh, yeah? She told me that."

"Her kind only exists to bring ruination, steal souls, and defile anything human!"

"Geez."

"Oh yeah, mr. Lupa here is a paragon of openness and cooperation, isn't he? For the record, I personally only desire maximization of joy."

"Really? That sounds very related to my interests."

"She lies."

"That was my real ultimate desire. Or something close enough, anyway. Care to reveal what is yours, Lupa?"

"Oh, come on, tell me! I am interested! What do your actions aim to achieve? What future do you steer for, Lupa?"

"Yes, tell us! I'm sure it involves everyone's flourishing!"

"Come on, convince me to trust you more than I trust her! I'm sure your goals would be accepted by my society! Tell me what you want!"

"Tell us what you want!”

"Tell us!"

"Tell us!"

"Tell us!"

"Priority message received! Priority message received! Priority message received! Prio-"

...oh god... what in the Warp was that?! 

A nightmare.

Right. 

A kind of a nightmare that is a manipulation attempt.

Chaos sometimes gives people visions of the future, and they try to avert that future, and their efforts end up causing it.

Chaos sometimes gives people visions of the future, and they accept it as their future, and their acceptance ends up causing it.

Chaos sometimes strikes deals with people during their dreams, and they keep the deals, and it turns out that their assumptions of the circumstances of the deal were badly mistaken.

Chaos sometimes sends dreams of explanations that are false, but appear to be the plain truth given the known facts.

Chaos sometimes sends revelations that are like the examples above, and the target carefully sidesteps any traps and manipulations that the revelation might be causing by increasing their vigilance a hundredfold, and then their excessive vigilance ends up their undoing.

And sufficiently serious men have already read all of those reports. 

If your behavior predictably changes as a result of receiving information fed by an enemy, you have made yourself manipulatable.

Simultaneously, if you do not modify your behavior at all as a result of receiving information of involvement of an enemy, you have blinded yourself to enemy activity.