from typing import Tuple


def _in_0_region(
    interaction_coefficients: Tuple[float, float, float],
    weyl_tol: float = 1e-8,
) -> bool:
    """Tests if (x, y, z) ~= (0, 0, 0) assuming x, y, z are canonical."""
    x, y, z = interaction_coefficients
    return abs(x) <= weyl_tol and abs(y) <= weyl_tol and abs(z) <= weyl_tol