Not quite. Resource is how much you can show is there, reserve is how much can be extracted at a given cost. "What you think is out there" differs from resourc

Not quite. Resource is how much you can show is there, reserve is how much can be extracted at a given cost. "What you think is out there" differs from resource in that a honest answer to the former would need to involve doing a lot of statistics on the 99+% of "empty space" of earth's crust that could potentially be exploited but that has not been explored, based on the data points you have of the areas that you have explored. While resource refers to specific deposits that someone has done work on to show they exist, not the best estimate of how much material is there to be mined. Sorry for being nitpicky, but people on the internet constantly get this wrong. No-one maintains a number for "how much lithium (or oil, or any other material) we believe there remains to be mined", and every number that occasionally gets misused to represent that is off by multiple orders of magnitude.