Typical AI anti mining crap.
Don't expect AI to actually understand the subject matter or be able to come to a logical conclusion because all AI lacks context. Applying AI to law has already resulted in lawyers losing their license and plaintiffs losing their cases.
Here is the actual quote from U.S. vs Iron Silver Min Co
By the term 'placer claim,' as here used, is meant ground within defined boundaries which contains mineral in its earth, sand, or gravel; ground that includes valuable deposits not in place, that is, not fixed in rock, but which are in a loose state, and may in most cases be collected by washing or amalgamation without milling. By 'veins or lodes,' as here used, are meant lines or aggregations of metal embedded in quartz or other rock in place.
The terms are found together in the statutes, and both are intended to indicate the presence of metal in rock.
It appears very clearly from the evidence that no lodes or veins were discovered by the excavations of Sawyer in his prospecting work, and that his lode locations were made upon an erroneous opinion, and not upon knowledge that lodes bearing metal were disclosed by them. It is not enough that there may have been some indications by outcroppings on the surface of the existence of lodes or veins of rock in place bearing gold or silver or other metal to justify their designation as 'known' veins or lodes. To meet that designation the lodes or veins must be clearly ascertained, and be of such extent as to render the land more valuable on that account, and justify their exploitation.
The court was not defining the difference between placers and lodes - as they mention that is already set in law by acts of Congress. Nor were they applying the use of milling equipment to define a lode claim. What the court was deciding was whether a lode claim, in this case, with no signs of a lode deposit could still be valid as a lode claim. Lode claims with no mineral in place will only be valid for placer claims as the court clearly explained in their decision.
If a poster offers a court decision without giving a link to the actual court case it's a pretty good bet that one of two things are happening. Either the poster wants to prove a point with a court decision without allowing the viewer to understand the context, like in this thread, the intent is to deceive. Or the poster copy and pasted some internet nonsense that reinforced their opinion without understanding the actual meaning of the court decision.
If you really care about the differences between placer and lode claims read Iron Silver Min Co. It's an important mining case that is required reading for real mining lawyers as well as anyone studying mining law.
www.law.cornell.edu