I should mention, I did not say common sense = Austrian Economics. There is nothing common about Austrian Economics.
Merely: (a) formal logic, (b) discrete math (Karl Menger, the younger, argued that in fact Austrian verbal arguments can all be stated via math, and are in fact even more general hence powerful than most ad hoc partial derivative constructions,which require a continuous function of quantity). Ken Arrow’s monograph against Samuelson also reinforces this.
In my own notes, I simply do a litmus test on everything that I read: pick a formal logic system and test the relations of definitions. In math, which follows, if the definitions are wrong, then everything that follows is wrong.
I do not say that you shouldn’t read mainstream economics. You should. But you should have a formal system of error checking and be critical of everything. Also, this applies to Austrian Economics, which does not have one main line of thought; there are multiple arguments and you have to decide which is formally adequate.
Truth is, even Kirzner’s stuff can be stated mathematically. Hint: think of topographic integrals, which have not been widely used in economics. I’m writing a paper on it.
Truth is, on the other hand, most of the mainstream stuff is mathematically nonsense; no more no less.
For instance, Samuelson proved a normal distribution of first-order differences occurs on the stock market. How? He integrated a hypothetical first-difference function, which he just assumed. But any function that can be integrated has a normal distribution of first-order differences. In other words, he assumed normal distribution and hence normal distribution. Central limit theorem, which you would assume Samuelson was aware of.
So his proof had one purpose: to sidetrack the question, and pretend he had a response to Mandelbrot. Such nonsense is quite common, and if you don’t pay attention to authors like Samuelson after that you will not really miss anything. Same goes for Leontief (he claimed he can formulate a perfect five-year plan with mandatory resource allocations for all firms that will beat the market!), Krugman, Stiglitz, et company.