a) trade organizations (we're all the onion farmers in Nebraska and want to make sure the Nebraska legislature doesn't pass laws that negatively impact us and promote laws that help us)
and
b) activist organizations (we're a coalition of organizations that protect water usage in the Mississippi delta and want to pass laws that promote conservation in those states)
Those groups often choose to retain professional lobbyists but will also send groups of interested parties to lobby who are not professional lobbyists.
Do you also ban trade organizations and activist organizations in this case? Do you carve out exceptions for them and just ban the "freelance" lobbyists? Most lobbying is meeting with legislators and talking with them about issues, educating them. How do you ban that without making legislators effectively useless (or if you're cynical, even more useless)?
In an ideal world, juniors would all do this too, but I don’t blame them if they don’t. So it’s very important to do it if you have the social capital.
Of course the idea that your point of origin must be fixed from time A to time Z if you’re willing to allow for time travel is itself flawed. If you could somehow move an object to an arbitrary time you could move them to an arbitrary point in space, and your ability to calculate may be significantly greater on the grounds that you’d have more advanced technology than us. It’s all scifi woo though until someone actually time travels.
This fact alone means that any time traveler is most likely to arrive in the middle of empty space.
Either the author didn't do a literature review before publishing, isn't well versed in the field, or chose not to cite works which may not agree with their results. Neither of which reflects well on the author.
> Following an ecological integrative approach, we examined the associations between published representative and standardized European population vitamin D data and the Worldometer COVID-19 data at two completely different time points of the first wave of this pandemic.
and
> Thus, a major limitation of our ecological approach is that we had to rely on published - but perhaps not always completely representative - data on the vitamin D status of the populations in Europe.
Edit: You can also click on his name in the original post (or the link above) and see all the papers in pubmed authored by him.
Edit 2: These two papers:
Veugelers PJ, Ekwaru JP. A statistical error in the estimation of the recommended dietary allowance for vitamin D. Nutrients. 2014;6(10):4472–4475. - PMC - PubMed Veugelers PJ, Ekwaru JP. A statistical error in the estimation of the recommended dietary allowance for vitamin D. Nutrients. 2014;6(10):4472–4475. - PMC - PubMed
and
Heaney R, Garland C, Baggerly C, French C, Gorham E. Letter to Veugelers, P.J. and Ekwaru, J.P., A statistical error in the estimation of the recommended dietary allowance for vitamin D. Nutrients 2014, 6, 4472-4475; doi:10.3390/nu6104472. Nutrients. 2015;7(3):1688–1690. - PMC - PubMed
Seems... like a quack.