How to Use "presume" with Example Sentences

1. They presume the man to be innocent .
2. America did not presume to know what was best for everyone .
3. Today 's privacy rules presume a relationship between citizen and government or consumer and company .
4. It may be necessary to presume he exists but when will that cease to be true ?
5. You presume that use of a service is understanding that it will provide information that will always suit your question .