Well, if we're being pedantic, the fact that you have never noticed a bug in Vim, grep, and PostgreSQL does not mean they don't exist. If you google, e.g., "pos

Well, if we're being pedantic, the fact that you have never noticed a bug in Vim, grep, and PostgreSQL does not mean they don't exist. If you google, e.g., "postgresql bug" you will find evidence of this. The charitable reading of GP's comment is, of course, that virtually all software has bugs, or that all complex software has bugs. Or, even better, that it is extremely difficult to write bug-free code, and this difficulty rapidly increases with the complexity of the software.