PDFs of the cosine of the angle γ between DALE and the directions of filaments from the Bisous model. The neighbourhood radius ν = 2.0,7.0,24.0,48.0h^-1 Mpc. The observed signal with its 95% confidence interval is depicted in black; the selection effect is depicted in red. Excess of high (and deficiency of low) values of observed cosγ compared to the PDF of the selection effect indicates parallel alignment of DALE relative to directions of filaments.