What I've learned in my own work, with great success, is that small truths add up. And if I follow that maxim, the end result is just software does precisely what I intended it to do. Which is why I have a lot of pity for developers who just accept that having a ton of bugs in their code is normal. So normal that they cope and call them features.

But nothing I've ever made or designed has been perfect by a long shot; software, control systems, electrical systems, mechanical structures, data collection/analysis systems, video monitoring systems, etc. But they all did what they were supposed to, and got the job done.