Examples of prior’s influence on the posterior for the case of a realisation of the β-Pictoris template with 25 sources and fully observed radial velocities. The panels show kernel density estimates of the prior (dotted lines) and posterior (solid lines) distributions for the cases in which the prior is younger than (upper panel, µ_τ = 10 Myr), centred at (mid panel, µ_τ = 23 Myr), and older than (lower panel, µ_τ = 40 Myr) the system’s true age of 23 Myr (vertical orange lines). In all cases, the prior dispersion is σ_τ = 8 Myr. The mean and 95% HDI of the posterior are also shown in the black text, while the orange text shows the percentages of the prior distribution that lay below and above the true age.