Can two MUSTs make a MAY?

Or are these scoped MUSTs?

<quote href=" http://www.w3.org/TR/xmlquery-req#section-General-Requirements
">
The XML Query Language MAY have more than one syntax binding. One query
language syntax MUST be convenient for humans to read and write. One query
language syntax MUST be expressed in XML in a way that reflects the
underlying structure of the query.
<quote>

Thanks,

Evan Lenz
XYZFind Corp.