slide 49

Quantified Expressions (`some` and `every`)

Do these expressions satisfy these conditions
Returns a boolean
some: test if at least one item in the sequence satisfies the condition
```
some $variable in expression satisfies expression
```
every: tests if all values in a sequence satisfy the condition
```
every $variable in expression satisfies expression
```

every $x in /students/student/name satisfies $x = "Steve"

(With thanks to Evan Lenz for the example)

Quantified Expressions (some and every)