Not Equal: Everything in this space must be different. The answer is 2-2, placed horizontally; 4-4, placed vertically; 0-0, placed vertically.
One of the reasons the 3614 is obscure is that its replacement, the IBM 3624
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Sam Altman would like to remind you that humans use a lot of energy, too
`@receiver isNil ifTrue: `@nilBlock -> `@receiver ifNil: `@nilBlockIn fact, both versions work—but they apply different filters to the target node. Try to remember which one.