Yes @Davisite what first gave me the idea was an excersise we did a lifetime ago when I was subscripted into the army and out in the bush our captain demobstrated the accuracy if communal wisdom by asking the platoon to estimate the distance to a big tree. After calculating the average, we measured it out, to find it was within two metres of the estimate. So I place great credence in the figures of 16.5c tomorrow and 29.5c at years end
