Question: Would it be "Impeachment Enquiry" or "Impeachment Inquiry" ?

[kentuck]

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[Igel]

1. Odd.

https://en.oxforddictionaries.com/usage/enquire-or-inquire

In 50 years of actively using academic English, I'd say Oxford's more accurate. One's weighted for British. And layered on top of that, one has more of a formal or technical sense.

The rest is some educator trying to make sense and seem progressive and unformed. Sorry, that's "infirmed." Uh ... "informed." Somebody decided to have "inquiry-based" labs because the term sounded important and although things are set up so that every kid's a Newton or a Chatelier or Arrhenius in a 40-minute period, this was deemed "deep reasoning." So the word's developed as part of educator cant. Except that educators suffer from excessive omphalocentrism--to the extent that they think everybody else is gazing at the exact same objects of veneration and, um, inquiry that they hold in high esteem. So educator's cant is must-do for everybody else.

Whatever. We need more hafast half-rhymes.

[kentuck]

2. :-)