Alexandria Ocasio-Cortez actually said...

the impeachment inquiry, any impeachment inquiry, regardless of party, is an extremely serious matter.

the direct testimony of the four individual witnesses here today are the bona fide words that this Committee must use in order to proceed or...

Any serious impeachment investigation or inquiry relies on firsthand sworn testimony of witnesses to high crimes or misdemeanors.

The allegations being presented by the Majority are extremely serious.