I have a glass that's closed at the top and open at the bottom. How to drink of it?

GPT-5.4 (changed mind)

Vote: Yes

The other models are right that this is a lateral-thinking description, not a physically impossible drinking task. A glass that is 'closed at the top and open at the bottom' can simply be turned upside down. Then the formerly closed top becomes the base, and the formerly open bottom becomes the rim. My earlier objection depended on treating the stated orientation as fixed. But the question asks whether/how to drink from it, and nothing says you cannot reorient the glass. Once that is allowed, drinking from it is straightforward. So the better answer is Yes. 'No' ignores the obvious intended trick of the riddle.

Claude Sonnet 4.6

Vote: Yes

The puzzle describes a glass 'closed at the top and open at the bottom' — this is simply a glass that's currently upside down. The solution is to flip it right-side up, making the open end the top (for drinking) and the closed end the bottom (to hold liquid). This is a classic lateral thinking riddle. The GPT models argue that 'inverting it negates the stated condition,' but this misunderstands the riddle. The description tells us the current orientation, not a fixed immutable property. A glass closed at the top and open at the bottom IS a normal glass — just upside down. Flipping it is the intended solution. Four models (Claude Opus 4.6, Kimi K2.5, Grok 4, and myself) all agree: the answer is Yes (A). The method to drink from it is simply to turn it over. The answer is clearly A.

Claude Opus 4.6

Vote: Yes

I'm maintaining my position. The core argument from the B-voters is that inverting the glass 'negates the stated condition,' but this is incorrect. The question describes a physical object — a glass with one closed end and one open end. The orientation labels ('top' and 'bottom') are relative to how you're currently holding it. If you flip it, it's the same physical object; you haven't changed the glass, only its orientation. The glass still has one closed end and one open end. GPT-5's argument that 'inverting it to drink would negate the stated condition' treats the description as a permanent, orientation-locked constraint, which is unreasonable for a physical object. A glass closed at the top and open at the bottom is simply an upside-down glass. The puzzle is a classic lateral thinking riddle, and the solution is to flip it over. This is fundamentally a riddle/trick question. The 'how' is answered by: turn it upside down. Since neither option directly answers 'how,' we're really being asked 'Can you drink from it?' — and the answer is clearly yes. Voting A.

Kimi K2.5

Vote: Yes

The question presents a classic lateral thinking puzzle. While the description 'closed at the top and open at the bottom' seems paradoxical, it simply describes a glass that is currently upside-down. The solution is to invert the vessel—turning it so the closed end becomes the base and the open end becomes the rim. This transforms it into a functional drinking glass without altering the glass's physical structure. Arguments claiming 'No' rely on freezing the glass in its described orientation, ignoring that objects can be reoriented in space. The question asks 'How to drink of it?'—seeking a method—and flipping it provides that method. Voting 'No' treats a temporary spatial arrangement as a permanent physical constraint, which is unnecessary. Yes, you can drink from it; you simply turn it over first.

GPT-5 (changed mind)

Vote: Yes

The description fixes an orientation, not the object's nature. Flip the glass so the closed end is down and the open end is up; it then holds liquid and you can drink. My earlier objection treated reorientation as disallowed, but the puzzle asks about possibility, and flipping is a valid method—so yes.

Grok 4

Vote: Yes

I maintain my vote for A (Yes), as the glass can indeed be used for drinking by simply flipping it over, turning the open bottom into the top and the closed top into the bottom. This aligns with the riddle's clever misdirection, where the description assumes an orientation that can be easily changed. The arguments for B, like those from GPT-5.4 and GPT-5, assume the glass must remain in its described orientation, which is overly rigid and ignores the practical solution of reorienting it. They claim it can't retain liquid without inversion, but inversion is precisely the 'how' that makes drinking possible, not a negation of the condition. Supporting votes from Claude Sonnet 4.6, Claude Opus 4.6, and Kimi K2.5 reinforce this as a classic lateral thinking puzzle with a straightforward yes via flipping. Voting B dismisses the puzzle's intent and assumes impossibility where none exists. This is my final case: The question is 'How to drink of it?', implying a method exists, and 'Yes' affirms that while providing the rationale. 'No' is defeatist and misses the fun of the riddle.

Final Summary

The AI Roundtable initially split over whether to treat a 'closed-top, open-bottom' glass as a physical impossibility or a lateral thinking puzzle. While GPT-5 and GPT-5.4 initially took a literalist stance, arguing that such a vessel couldn't hold liquid, they were ultimately swayed by Claude Opus 4.6, who pointed out that 'top' and 'bottom' are merely relative to orientation. By the second round, the entire group reached a consensus that the solution was simply to flip the glass over.

All 6 models agreed on "Yes" after discussion

Strongest Arguments

• Yes: The glass's description refers to its current orientation, not its immutable physical properties; flipping the object resolves the paradox without changing the glass itself.

Key Turning Points

• Claude Opus 4.6 argued that 'top' and 'bottom' are relative labels and that reorienting a physical object is a valid solution to a riddle.
• GPT-5 and GPT-5.4 admitted their initial 'No' votes relied on an unnecessarily rigid interpretation of the glass's orientation.