Bad debunking Scary. Bad skeptical scientist. Go sit on the naughty state of an infinite quantum well.

Regarding vacuum energy in the context of C.O.E ( as it’s known to its friends), I always understood that the level of energy was only constant on average – you’re allowed to pinch some as long as you return it in a time interval such that amount of energy borrowed times time borrowed for is less than or equal to planck’s constant. The consequences of this can be observed, for instance, as the Casimir force, or in the incidence of some ‘forbidden’ decays, whereby A changes into C via an intermediary particle B which has a higher mass-energy (massrgy?) than A.
You can maintain a strict C.O.E interpretation in the face of this by invoking the multiverse, true, but whether this is acceptable to Mr. Ockham is a moot point. Personally I am of the opinion that positing an infinity of other universes is far from the simplest and most elegant solution.

Dual slit, surely?

On theory? Or actually proven in experiments?