You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
certain
Certainty (also known as epistemic certainty or objective certainty) is the epistemic property of beliefs which a person has no rational grounds for doubting. One standard way of defining epistemic certainty is that a belief is certain if and only if the person holding that belief could not be mistaken in holding that belief. Other common definitions of certainty involve the indubitable nature of such beliefs or define certainty as a property of those beliefs with the greatest possible justification. Certainty is closely related to knowledge, although contemporary philosophers tend to treat knowledge as having lower requirements than certainty.Importantly, epistemic certainty is not the same thing as psychological certainty (also known as subjective certainty or certitude), which describes the highest degree to which a person could be convinced that something is true. While a person may be completely convinced that a particular belief is true, and might even be psychologically incapable of entertaining its falsity, this does not entail that the belief is itself beyond rational doubt or incapable of being false. While the word "certainty" is sometimes used to refer to a person's subjective certainty about the truth of a belief, philosophers are primarily interested in the question of whether any beliefs ever attain objective certainty.
The philosophical question of whether one can ever be truly certain about anything has been widely debated for centuries. Many proponents of philosophical skepticism deny that certainty is possible, or claim that it is only possible in a priori domains such as logic or mathematics. Historically, many philosophers have held that knowledge requires epistemic certainty, and therefore that one must have infallible justification in order to count as knowing the truth of a proposition. However, many philosophers such as René Descartes were troubled by the resulting skeptical implications, since all of our experiences at least seem to be compatible with various skeptical scenarios. It is generally accepted today that most of our beliefs are compatible with their falsity and are therefore fallible, although the status of being certain is still often ascribed to a limited range of beliefs (such as "I exist"). The apparent fallibility of our beliefs has led many contemporary philosophers to deny that knowledge requires certainty.
Hi,
Having wet underfloor heating put in and been doing some reading, think pipe spacing is going to be 200 but read somewhere 100 from walls & sliding doors/bi-folds - is that correct ?
What distance would people recommend from kitchen units ? I have a run against one wall and then a 1200...
Hey,
Not sure if I'm allowed on here - I'm just a homeowner. Not a plumber/professional.
I've now had 3 plumbers visit and none seem to be able to diagnose this problem.
So, I have a standard Worcester Bosch combi boiler in my 4 bedroom, 2 bath, 1 WC flat (on 3 floors).
Heating works like a...
Hello i am looking for some help before i phone the sparkie.
I have an electric boiler - Santon premier heat electric flow boiler 6kw
I have an unvented 120L indirect hot water cylinder.
2x 2 port valves.
no room thermostat as its a 1 bedroom flat.
Programmer - ACL lifestyle LP112
i am 99%...
Hi all,
Hoping someone can help. I have a 1930's house and in the waste man hole I have two redundant pipes that look like they go somewhere underneath my house. When the wind blows in a certain direction a smell comes from under the floor. It probably happens once every two weeks. Could these...
Tom-smith
Thread
attach
certain
coming
direction
oil
pipes
should
smell
soil
these
underfloor
wind
Just looked at the job i have on this morning and just realised i try to avoid this postal area due to mainly being a bit of a dump .
Any of you lot have postal areas you wish to avoid ?
To late to turn this one away.
Small drip is coming from the bottom of my combi boiler, it only happens when I use the downstairs loos hot tap. It doesn't happen any other time......any clues???
Hi all,
Have a problem with several of my radiators that had been plagueing me for the past couple of months.
Summary:
4 radiators on same loop fed from 1st floor
2 on first floor (landing & Livingroom)
2 drop down to ground floor(entrance hall & Kitchen)
3 intermittent (entrance hall...
Mtbamplumb
Thread
balancing
certain
draining
flushing
heating
not heating
problem
radiator
radiators
tried
We've recently built a new 2 bedroom extension and are now needing to fit the radiators and are also going to have a new Worcester Bosch 34 CDI boiler installed.
We've had a few people down for some quotes, but they seem to have different ways of doing the job and so we're just a bit confused...
CDH11
Thread
boiler
central
central heating system
certain
heating system
house
radiators
system
Hi, I am new to this site and I hope I am posting my query in the correct forum.
i have a problem with my underfloor heating, I will try and explain as best as I can.
i have underfloor heating in 2 floors, ground and 1st. Each floor has multiple zones effectively each room in the house.
i...
Manishpatel1971
Thread
central heating system
certain
forum
heating
hot
hot water
plumbing
ufh
under floor heating
underfloor
underfloor heating
water
zone
zones
Hi
I'm trying to model a domestic heating system for an academic project. I understand that when heat is required a boiler will heat the system until the return temperature reaches a certain temperature (assuming the set temperature has not been reached first). It will then remain off until the...
nickpgood
Thread
central
central heating
certain
controls
heating
return
system
temperature
water
which
Good morning to you all wise men.
A friend of mine, after receiving a water bill for twice the normal amount, is convinced that there is a leak on the supply pipe to her property, as they can not see anything wrong inside the house.
I haven't been there yet to look, but is there a way that you...
It was a little baby magpie stuck behind a gas fire. i normally just pull our dead ones on services etc so was well chuffed i could let him/her go outside.
cust had earlier called saying she could hear weird noises behind the fire.
julesverne
Thread
certain
engineer
first
gas
gas engineer
gas safe
gas safe register
gsr
safe
today
Friday at lunch time went out to replace a Diverter valve in a vaillant turbomax 242/1e the job was going very well until the clip that holds the mains push fit in to the diverter snapped was very brittle rang vaillant to ask what could be done, this clip has its own part number The HeatXchange...
If replacing a shower enclosure will any correctly sized (say 1000 by 800 offset quadrant or whatever) fit any existing tray or is it always better to source the original item to ensure dimensions line up with matching tray / original fixings / marks on tiles etc..? One factor might be if the...
Hi guys im currently on a plumbing apprentiship in my second year and on one of my latest assignments theres a question which asks:
State what Height you would fit the following sanitary ware
a. wall mounted Basin
b. Belfast sink
c. Adult Urinal and Juniour urinal bowls.
Many thanks
How do you become an approved installer say for baxi , worcester or any boiler manufacturer. do you need to install a certain number of there boilers before getting approved.
I have a problem with my Worcester 24i combi boiler... It will not turn on (ignite) when i turn it on manually at certain times of the day. E.g. It will always work between 1am - 6am but will never work outside of those hours. Even if i set the timer to start outside of those hours, it still...
robbie676
Thread
24i
between
central
central heating
certain
heating
hours
still
timer
times
tried
turn on
worcester
Hi
My kitchen tap (Ikea, just over a year old) recently started dripping but at certain times of day. Today, for example, it was fine until 10.30am and now it is dripping. In the evening it usually stops. I end up turning off the water at the stopcock during the day.
A plumber came out...
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.