Reliability and validity are concepts in measurement. Reliability has to do with the degree to which an instrument can produce consistent results when it is used repeatedly over time. Validity, on the other hand, indicates the extent to which the instrument measures its intended measurement. The scale can be reliable but not value as it still produces results, though inaccurate.
The 4th Amendment says that the you're secure in your home and it stops people from entering your home without your permission and stuff like that so yes that's true.
