Uh, no I'm not sure how you could draw that conclusion from the original statement. It says that the widget saves $4 worth of electricity, which is off the house's shared electric bill, so $1 per person. All those things were in black and white on the original post, so i'm not sure how you could say they were the ambiguous parts.
The OP states how much the bill was changed by the widget being there, $4. And that if you have one then it costs you $3 to run, personally. (hence, "in your room" and "limited interaction").
You will save $1 on your share of the electric bill, but have spent $3. Should you buy the widget?
$3 is just listed as an abstract cost here, but it's clearly indicated to be separate from what you saved on your share of the electric bill.
Except, as weird says, the Bitcoin producing widget explicitly CONSUMES 4 in electricity, so, therefore, the reader assumes the 'cost to run is electricity. You can't have one be electricity and the other something else because it breaks the thought experiment.
I just said it's money. And it was listed as a separate category from the electric bill. How much simpler does that need to be?
You will save $1 on your share of the electric bill, but have spent $3.
the "but" here is clearly saying the $3 is a separate cost that's not part of the electric bill.
Okay, fine, money, but the context here is paying an utility bill, so, is the money drain coming from your pocket or the bill
Also, if the three dollar cost is separate from the bill, then how much DOES it cost to run on the electricity?