Fieldtrip, 18 March

Says the OED:
artefact ...Anything made by human art and workmanship; an artificial product. In Archæol. applied to the rude products of aboriginal workmanship as distinguished from natural remains.

The Assignment:

So what's an explication? The OED again:

1. The action or process of unfolding (flowers, leaves, etc.). Obs.
2. The process of developing or bringing out what is implicitly contained in a notion, proposition, principle, etc.; the result of this process.
3. The action or process of stating or describing in detail; a detailed statement or description.
4. The action or process of unfolding the cause or origin of a phenomenon; a statement made for this purpose. Obs.
5. The action or process of removing difficulty or obscurity from, or making clear the meaning of (a word, statement, symbol, etc.). Also, that which effects this; an explanation, interpretation.