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What is the next logical step I can take when solving the Nov. 30 2023 Sudoku in the Wisconsin State Journal?

There are a number of techniques that are available at this stage. The first one that jumped out to me was a: Looking at: We see that:
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Sudoku variants #2: Lined Numbers (6x6 grid)

Solution: Step by step: 1: 2: 3:
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A 4x4 sudoku shouldn't be that hard, right? Right?

Since brute force and programming is not allowed, let us start thinking:
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