Turns out it was FOOF.

Opportunistic Lab Intern:

“While you’re all debating if it’s half full or half empty I drank it. Now it’s empty.”

Realist: who’s cleaning all these glasses?

Engineer: the glass is twice as big as in needs to be.

Ahh found that label!:

99.985% Pure.

Nitrogen (N₂): 39%

Oxygen (O₂): 10.5%

Argon (Ar): 0.465%

Carbon dioxide (CO₂): 0.02%

Water (H₂O): 50%

Topologist: that is a plate

The beaker is always full, when it's half full of water, it is also at the same time half full of air. THE GLASS IS ALWAYS FULL

Scientist Russian Roulette: Drink the mystery breaker. They all have water, except for one that's hydroflouric acid.

People who call themselves realist tend to be pessimists.

Engineer: the glass is underutilized/over-sized

Management: Lets hire a consultant to investigate the value proposition of downsizing glasses and discuss the results over a company expensed dinner.

I thought the half full, half empty thing. Was about the flow of water. If you're emptying the glass, at some point the glass will be half empty. If you fill the glass, at one point the glass will be half full.

It's not 'is the glass half full or half empty'.

The question is 'why is the glass?'

Once you know this, the first question is easy to answer.