Posterior probability density of the tensor-to-scalar ratio at two different scales. The inflationary consistency relation is relaxed and r_0.002 and r_0.020 are used as sampling parameters, assuming a power-law spectrum for primordial tensor perturbations. When the BKP likelihood is included in the analysis, the results with Planck TT+lowP+BAO and Planck TT, TE, EE+lowP coincide (dashed and solid red curves, respectively).