User:Tropylium/Inductee

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An inductee is a pattern which is not a still life, but can exist as an island within a still life. All of its living cells must have 2 or 3 neighbors, and all cells to be born must be on the edge of the pattern (for a certain definition of "edge").

This 7-cell pattern is the simplest single-island S23 pattern that isn't an inductee:

.O...
O.O.O
.O.OO