In the Smithsonian site number 26CH798, the number “26” stands for the:

Georeferenced means:

Natural levels are preferable to arbitrary levels because:

Global Positioning Systems operate:

While the vertical excavation strategy at Gatecliff was designed to clarify chronology, the horizontal excavation strategy was designed to:

Realizing the significance of Ötzi, the “Ice Man”, archaeologists scoured the site and recovered:

The antiquity of humans in the New World was established by the Folsom site. Why?

Matrix sorting is a technique:

Convert the statement into symbolic form.  Let:             p denote the statement “Jack committed a crime”, and             q denote the statement “Jack is 21 years old.” Select the symbolic form that denotes the given statement. Jack committed a crime and he is not 21 years old.

The following sentence is a statement (true or false): If the forecast is correct, then it will rain.