Could you provide something to backup your statement?
As further examples of my point, beyond the laws, legal precedents, customs, and institutions mentioned above: None of the executive branch departments (State, Justice, Defense, Treasury, etc.) are mentioned in the Constitution. No federal court besides the Supreme Court is mentioned. Even specific laws are only loosely defined; for freedom of speech, no provision is made for slander, fraud, harassment, government secrets, etc.; for the right to bear arms, nothing defines what 'arms' are (and I don't suggest we try to define them here). The filibuster and other Congressional rules are not defined. Etc.