you never know what there is to it.You have to watch these things before they start growing on you.
A tinkerer with gadgets is a much more accurate description. Here, guided by his trusty pendulum, he enters the basement where Tintin and Haddock have just found the treasure.Copyright by Hergé
Throughout the book, he keeps picking up signs that the treasure is located "West... always to the West" while it isn't there at all.
Still, he finds it in the end, misguided or not. Proof that his pendulum really works? Not that it's of any use.
Now that's pseudo-science for you.