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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: A Complex Metaphysical Conundrum
Date: Fri, 12 Apr 2024 14:52:25 +1000
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On 12/04/2024 4:38 am, Cursitor Doom wrote:
> On Thu, 11 Apr 2024 14:02:56 -0400, "Edward Rawde"
> <invalid@invalid.invalid> wrote:
> 
>> "Cursitor Doom" <cd@notformail.com> wrote in message
>> news:pk8g1j9u6joiofssfcg9g9qed1lcikluta@4ax.com...
>>> On Thu, 11 Apr 2024 11:58:02 -0400, "Edward Rawde"
>>> <invalid@invalid.invalid> wrote:
>>>
>>>> "Cursitor Doom" <cd@notformail.com> wrote in message
>>>> news:76nf1j9j04rknbh5kgta74nteeeht3303n@4ax.com...
>>>>> On Wed, 10 Apr 2024 21:10:59 -0400, "Edward Rawde"
>>>>> <invalid@invalid.invalid> wrote:
>>>>>
>>>>>>
>>>>>> "Cursitor Doom" <cd@notformail.com> wrote in message
>>>>>> news:cs4e1j5ohhb7fpcmnft14ad6pv66jtvi34@4ax.com...
>>>>>>> On Wed, 10 Apr 2024 18:18:21 -0400, "Edward Rawde"
>>>>>>> <invalid@invalid.invalid> wrote:
>>>>>>>
>>>>>>>> "Cursitor Doom" <cd@notformail.com> wrote in message
>>>>>>>> news:i52e1j9ctjqi1k1m9ej1aid2493foetnsq@4ax.com...
>>>>>>>>> On Wed, 10 Apr 2024 16:11:39 -0400, "Edward Rawde"
>>>>>>>>> <invalid@invalid.invalid> wrote:
>>>>>>>>>
>>>>>>>>>> "john larkin" <jl@650pot.com> wrote in message
>>>>>>>>>> news:v6sd1j1sr89ntc214dku5u5e04pks5toud@4ax.com...
>>>>>>>>>>> On Wed, 10 Apr 2024 15:57:55 -0400, "Edward Rawde"
>>>>>>>>>>> <invalid@invalid.invalid> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> "Cursitor Doom" <cd@notformail.com> wrote in message
>>>>>>>>>>>> news:c6hd1jdjimga6ifo7b0kv7bqfj9750lbk3@4ax.com...
>>>>>>>>>>>>> Gentlemen,
>>>>>>>>>>>>>
>>>>>>>>>>>>> This is an exam question that trips up even some of the best
>>>>>>>>>>>>> students.
>>>>>>>>>>>>> See what you make of it!
>>>>>>>>>>>>>
>>>>>>>>>>>>> Q: Is this statement correct: 'The signal level at the modem
>>>>>>>>>>>>> input
>>>>>>>>>>>>> increased by 2dBmV going from +3dBmV to +5dBmV.'
>>>>>>>>>>>>>
>>>>>>>>>>>>> Your pal, CD.
>>>>>>>>>>>>
>>>>>>>>>>>> Changing a signal level can be thought of as multiplying the
>>>>>>>>>>>> signal
>>>>>>>>>>>> by
>>>>>>>>>>>> a
>>>>>>>>>>>> constant.
>>>>>>>>>>>
>>>>>>>>>>> You can change something by adding, too.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> I haven't looked at it in detail but a bit of playing with a search
>>>>>>>>>> engine
>>>>>>>>>> finds the question here:
>>>>>>>>>> https://broadbandlibrary.com/wise-and-mighty-decibel/
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Jeez, when I said, "No Googling" I didn't seriously think anyone
>>>>>>>>> here
>>>>>>>>> would be dumb enough to need to actually do so! :-D
>>>>>>>>
>>>>>>>> I don't see any mention of any search engine in your first post.
>>>>>>>>
>>>>>>>> I tend to agree with John Larkin on this.
>>>>>>>>
>>>>>>>> If a student can use a meter to see that a signal which was 3
>>>>>>>> somethings
>>>>>>>> is
>>>>>>>> now 5 somethings (depending on what is being measured) then I give
>>>>>>>> them
>>>>>>>> a
>>>>>>>> pass.
>>>>>>>
>>>>>>> So going back to the orginal question as stated, you're saying the
>>>>>>> statement in quotes is *correct* then. Nice to have a straight answer.
>>>>>>
>>>>>> If you mean that do I think that something increases by 2 when it goes
>>>>>> from
>>>>>> 3 to 5 then yes that seems reasonable to me.
>>>>>
>>>>> I'm afraid that's not exactly the question, though.
>>>>> Here's what was asked again:
>>>>>
>>>>> Q: Is this statement correct: 'The signal level at the modem input
>>>>> increased by 2dBmV going from +3dBmV to +5dBmV.'
>>>>>
>>>>> You've already nailed your colours to the mast with your opinion that
>>>>> the statement is correct. Are you happy with that or would you like to
>>>>> change your mind?
>>>>
>>>> What's wrong with the mind I already have?
>>>>
>>>> My opinion is in my first reply to you.
>>>>
>>>> Do the students who take this exam do any practical work or just sit in
>>>> class?
>>>
>>> They're students so of course they don't do anything useful.
>>
>> Is that because you don't teach them how to do anything useful or because
>> they don't want to be taught how do anything useful?
>>
> 
> Sorry, you're new here so you don't know who's who yet. I'm not a
> professor - far from it! And these are hypothetical students.

This leaves out Cursitor Doom's unique selling point, which is a 
devotion to particularly fatuous conspiracy theories.

His take on anthropogenic global warming is spectacularly perverse - 
he's happy to ignore the modern - accurate - data on atmospheric CO2 
levels which started being collected in 1958, on the basis that it was 
part of a long-standing conspiracy to frighten the public into 
supporting lots of academic climate scientists.

This rather ignores the fact that actual anthropogenic global warming 
didn't become statistically significant until the late 1980's so the 
conspiracy would have taken a long time to pay off.

-- 
Bill Sloman, Sydney