Steel welding quality?

[SteamyTea]

11 hours ago, saveasteading said:

 

Do we inherently understand triangulation though

It is possibly innate to many mammals, education, which is generally age related 'model' learning most likely stops us thinking about it.

I hated lecturing first year students as it took half a year to teach them to unlearn the very basic models of the world they had learnt at school.

It is called baggage.