Do these spellcasting foci from Xanathar’s Guide to Everything have to be held in a hand?

I see that, for example:

A cleric or paladin can use a holy symbol as a spellcasting focus, as described in chapter 10. To use the symbol in this way, the caster must hold it in hand, wear it visibly, or bear it on a shield.

Further, I see that the standard arcane focuses — orbs, crystals, rods, etc. — all have to be held in the hand. That makes sense to me.

What I’m not sure about is, for example, the Hat of Wizardry or the Dark Shard Amulet from XGTE. Both specify they can be used as a spellcasting focus (for wizards and warlocks respectively), but it does not make sense to me that e.g. a wizard would be required to hold their Hat of Wizardry in their hand to use it as a spellcasting focus, instead of wearing it. I can imagine a warlock having to grip their Dark Shard Amulet with a free hand, but that still seems like a bit of a stretch, especially when combined with somatic components.

Can these specific foci be used without holding them in hand?

Can LVM’s pvmove command skip extents that have never held data?

I am using pvmove to migrate LVM extents from one PV to another. It works like it should, however, the physical volumes are actually thin provisioned disks from two separate storage arrays. Both disks are 20G (5119 LVM extents), but the source disk had only 5GB of stored data on the storage array. After pvmove is finished, the destination disk has 20GB used on the second storage array, eliminating the benefit of thin provisioning.

Can pvmove be instructed to only copy the extents that have ever had data written to them? Does LVM even have that info, or is it just a side effect of the storage array allocating space on demand?

Ensuring a car rental reservation is held i.e. that the agency has a car for your when you arrive

I recently booked a car through a price aggregator site. After booking, I immediately received an email stating a reservation confirmation number. When I arrived at the rental agency, they said they had no car for me and to call the price aggregator site. I did. They told me that there was no guarantee that the car would be held and that I would have to go elsewhere to book the car.

I haven’t read the fine print, but in the immediate FAQs and text of the email, no where does it say that the car will be not held.

I don’t want to have to read lengthy terms and conditions every time I book a car. Is there a sure fire, yet quick way to make sure that my car is held when I reserve it?

Installing Mono on Ubuntu 18.04 fails (you have held broken packages). How to solve?

$   cat /etc/apt/sources.list.d/mono-official-stable.list  deb https://download.mono-project.com/repo/ubuntu stable-bionic main  $   cat /etc/issue Ubuntu 18.04 LTS \n \l    $   sudo apt install mono-devel Reading package lists... Done Building dependency tree        Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:  The following packages have unmet dependencies:  mono-devel : Depends: libglib2.0-0 (>= 2.56.3) but 2.56.1-2ubuntu1 is to be installed               Recommends: mono-csharp-shell but it is not going to be installed               Recommends: referenceassemblies-pcl but it is not going to be installed               Recommends: msbuild but it is not going to be installed E: Unable to correct problems, you have held broken packages.  $   dpkg --get-selections | grep hold  no output 

Passport held in Istanbul, Turkey by Customs

My friend flew from Austin, TX for a contract job to Istanbul, Turkey. Upon arrival he had to order $ 450k in construction equipment. His order was successfully processed and is currently sitting in Customs. The Customs agents took his passport due to them requesting another $ 84k in taxes. Due to his bank here believing his bank account had been compromised, his account is locked. Not only that, the Customs agents will not give him his passport even though they have his $ 450k in equipment, have appeared in person to harass him at the hotel. He is a widowed father of a young daughter who travels with him.

Both he and his daughter will be stuck in Turkey for Christmas and possibly longer. Any suggestions how to proceed as he must appear in Virginia to fix his account. They still have his equipment and passport.

Wrongfully held at Italian passport control for over an hour: can I get financial compensation?

Background for anyone who may not know: I, an EU citizen, have the right to enter any EU or Schengen state (in this case Italy) using either a passport or national ID card. It doesn’t matter whether I fly from the UK, Turkey or even the US; Italy is Italy and so EU law applies.

The issue at hand: just flew Chisinau-Kyiv-Milan, and, at passport control in Milan, presented my ID card, but once the officer found I had flown from Kyiv, rejected it and demanded a passport, which I didn’t have. He also demanded my boarding passes, which I had left on the respective aircraft.

I politely but firmly explained to him that, per the EU freedom of movement directive, I have the right to enter, and that it shouldn’t matter to him where I flew from, but I might as well have been talking to the wall.

I was taken into custody for potential deportees where I was held for over an hour, partly involving two officers asking totally irrelevant questions such as whether I had a ticket back home (which I didn’t as it was a re-routed flight – I blackrode trains back home) and insisted that, having flown from a non-EU state, I couldn’t enter Italy on my ID card.

Eventually, though, I was handed back my ID and let go with no further explanation.

I’ve already got an email address to send a complaint to.

What I’d like to know is if, besides demanding a proper lecture of the officer at the booth (whose ID number I noted down, which he clearly disliked) and a written apology from the chief officer, I could also demand financial compensation for being (in the end) 2 hours delayed back home because of this event, seeing as I was held for a completely illegitimate reason.

who will be held liable for bitcoin programs errors

so there was the Value overflow incident in which nearly 200 billion bitcoins are created; while the problem was fixed promptly, it introduced a fork where people receiving money on the stale fork might suffer financial loss; but bitcoin is decentralized so who would be held liable for such loss? the software author? the bitcoin inventor? or nobody? do users get acknowledged before they start using bitcoin that such bugs may happen and must accept a liability disclaimer to use bitcoin?