tokatlas
Teacher account

Grams of asteroid, years of travel

From East Asia·An enduring case

Japan's Hayabusa2 spent years travelling to asteroid Ryugu to bring back a few grams of material, though telescopes and spectra had already characterised it remotely. Laboratories worldwide then queued for milligram allocations. The mission priced the difference between inference and specimen.

The concepts this raises

Each of these gives a class a different way into the same case.

EvidenceGrounds of Knowledge
What is offered in support of a claim. Evidence is not the same as proof: it raises or lowers how likely a claim is, and its force depends on how it was gathered, what it was gathered for, and what else it is consistent with. Asking what would count as evidence against a claim is usually more revealing than listing evidence for it.
JustificationGrounds of Knowledge
The reasoning that connects evidence to a conclusion. Two knowers can hold the same evidence and be justified in different beliefs if their inferential standards differ. Justification is what separates knowing something from happening to be right about it.

Where it sits in the knowledge framework

Methods and tools
The practices, conventions, instruments and forms of reasoning through which knowledge here is actually made, together with the assumptions those methods build in and what they are structurally unable to detect.

Areas of knowledge

The same ideas, somewhere else

Cases that raise a concept this one raises, but in a different area of knowledge or a different part of the world. That contrast is the point: it is what shows a student the concept travels.