the page directive
overrides the values specified in the DD.
therefore if this attribute is mentioned in the
jsp,
the EL evaluation will unconditionally depend on the value of the attribute.
in other words,
if there's a <%@ page isELIgnored="true"
then EL is igrnored
if its value is false,
it is evaluated- as simple as that, the only variations come when there's no isELIgnored attribute mentioned in the page directive, in which case, the value in the DD decides what is to happen- and if even that is absent, the default value is taken- i.e EL
IS evaluated.