The confrontation between a powerful monarch and his royal advisors reaches a boiling point as the king exposes his total lack of trust in their abilities. Stripping away their tricks, he presents them with a clear, unavoidable ultimatum. If the wise men fail to reveal the exact contents of the dream, a single death sentence awaits them all, without exception [רש"י, מצודת דוד]. The king insists that this harsh punishment is entirely justified. He does not view himself as cruel, but rather as a ruler dealing with subjects who are actively conspiring to present him with lies and corrupt falsehoods [יוסף אבן יחיא].
The monarch suspects that if he simply asked for an interpretation, the advisors would invent a fake dream and a fabricated meaning, knowing perfectly well that there are no witnesses to prove them wrong [אלשיך]. In fact, it is highly possible that the king never actually forgot his dream. He may simply be pretending to have lost his memory as a deliberate test, waiting to see if his advisors dare to invent outright lies [מצודת דוד].
The king sees right through their current strategy, recognizing that they are desperately trying to stall for time until circumstances shift. This delay tactic serves several potential purposes. The advisors might be hoping that as time passes, the king's intense anger will naturally fade [אלשיך], or that he will simply become busy with other matters and forget the issue altogether [אבן עזרא]. Alternatively, they might be planning to invent a false interpretation that applies only to the distant future. By doing so, they assume that by the time their prophecy is proven false, the political climate will have changed, a new king will be in power, or they themselves will no longer be alive to face punishment [מלבי"ם, יוסף אבן יחיא]. Furthermore, stalling gives them the critical opportunity to consult with one another in secret and coordinate a uniform lie. If forced to answer on the spot, they would likely offer conflicting stories and expose their own deception [אלשיך].
Driven by this complete breakdown of trust, the king establishes a single, definitive test of truth. He demands that they first tell him the dream itself, as this is the only way he can be certain they are capable of providing its true meaning [ביאור שטיינזלץ]. He makes it clear that his faith in them is entirely broken; even if he were to remember the dream on his own later, he would no longer believe any interpretation they offered. The only way for the advisors to prove that their wisdom is genuine is to reveal what is completely hidden from them [מלבי"ם, מצודת דוד]. Only by accurately describing the dream can they demonstrate that their interpretation will be absolute and true, rather than just a vague guess [אלשיך].