if_it's_9:00_pst,_what_time_is_it_gmt

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5:00:00am Greenwich Mean Time

5:00:00am Western European Time (the European timezone equal to UTC)

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How do we know?

When it's the time 9:00pm in Pacific Standard Time (the American timezone UTC -8) what time is it in Greenwich Mean Time (the European timezone equal to UTC)?

Facts
Show facts

Show reasoning
Reasoning

I followed this chain of reasoning:

By calculation (generator: ["first_parameter@trueknowledge.com"]) I know that:

9:00pm is the first parameter of 9:00pm Pacific Standard Time

9:00pm is the first parameter of 9:00pm Pacific Standard Time

By calculation (generator: ["second_parameter@trueknowledge.com"]) I know that:

Pacific Standard Time is the second parameter of 9:00pm Pacific Standard Time

Pacific Standard Time is the second parameter of 9:00pm Pacific Standard Time

By calculation (generator: ["strictequal1@trueknowledge.com"]) I know that:

9:00pm Greenwich Mean Time is strictly equal to 9:00pm Greenwich Mean Time

9:00pm Greenwich Mean Time is strictly equal to 9:00pm Greenwich Mean Time

By calculation (generator: ["now@trueknowledge.com"]) I know that:

The current time is August 1st 2014, 07:58:13

The current time is August 1st 2014, 07:58:13

I know from locally stored knowledge that:

Fact 1: -8 hours is the time zone differential of Pacific Standard Time ([fact: ["20030753@trueknowledge.com"]])

Fact 1: -8 hours is the time zone differential of Pacific Standard Time ([fact: ["20030753@trueknowledge.com"]])

Fact 1
is true for
August 20th 2010, 15:32:53 onwards
([fact: ["933759482@trueknowledge.com"]])

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:

Fact 1 is true at August 1st 2014, 07:58:13

Fact 1 is true at August 1st 2014, 07:58:13

By calculation (generator: ["first_parameter@trueknowledge.com"]) I know that:

-8 hours and 0 minutes is the first parameter of -8 hours

-8 hours and 0 minutes is the first parameter of -8 hours

I know from locally stored knowledge that:

Fact 2: +0 hours is the time zone differential of Greenwich Mean Time ([fact: ["20030743@trueknowledge.com"]])

Fact 2: +0 hours is the time zone differential of Greenwich Mean Time ([fact: ["20030743@trueknowledge.com"]])

Fact 2
is true for
August 20th 2010, 15:32:46 onwards
([fact: ["933757702@trueknowledge.com"]])

By calculation (generator: ["timeperiodtopoint@trueknowledge.com"]) I know that:

Fact 2 is true at August 1st 2014, 07:58:13

Fact 2 is true at August 1st 2014, 07:58:13

By calculation (generator: ["first_parameter@trueknowledge.com"]) I know that:

0 minutes is the first parameter of +0 hours

0 minutes is the first parameter of +0 hours

By calculation (generator: ["strictequal1@trueknowledge.com"]) I know that:

January 1st 1, 01:01:01 is strictly equal to January 1st 1, 01:01:01

January 1st 1, 01:01:01 is strictly equal to January 1st 1, 01:01:01

-8 hours and 0 minutes
is strictly equal to
-8 hours and 0 minutes

0 minutes
is strictly equal to
0 minutes

By calculation (generator: ["timepoint_sum@trueknowledge.com"]) I know that:

December 31st 0 BC, 17:01:01 is the timepoint sum of January 1st 1, 01:01:01 and -8 hours and 0 minutes

December 31st 0 BC, 17:01:01 is the timepoint sum of January 1st 1, 01:01:01 and -8 hours and 0 minutes

January 1st 1, 01:01:01
is the timepoint sum of
January 1st 1, 01:01:01 and 0 minutes

By calculation (generator: ["timepoint_difference@trueknowledge.com"]) I know that:

-8 hours, 0 minutes and 0 seconds is the length of time between the timepoints January 1st 1, 01:01:01 and December 31st 0 BC, 17:01:01

-8 hours, 0 minutes and 0 seconds is the length of time between the timepoints January 1st 1, 01:01:01 and December 31st 0 BC, 17:01:01

By calculation (generator: ["difference_between_lengths_of_time@trueknowledge.com"]) I know that:

-8 hours, 0 minutes and 0 seconds is the difference between the scalar quantities -8 hours and 0 minutes and 0 minutes

-8 hours, 0 minutes and 0 seconds is the difference between the scalar quantities -8 hours and 0 minutes and 0 minutes

By calculation (generator: ["pinstance@trueknowledge.com"]) I know that:

Fact 3: -8 hours, 0 minutes and 0 seconds is a length of time

Fact 3: -8 hours, 0 minutes and 0 seconds is a length of time

Fact 3
is true for
all time

By calculation (generator: ["inverse_length_time@trueknowledge.com"]) I know that:

8 hours, 0 minutes and 0 seconds is the inverse of -8 hours, 0 minutes and 0 seconds

8 hours, 0 minutes and 0 seconds is the inverse of -8 hours, 0 minutes and 0 seconds

By calculation (generator: ["local_clock_time_sum@trueknowledge.com"]) I know that:

5:00:00am Greenwich Mean Time is the sum of the local clock time and the length of time 9:00pm Greenwich Mean Time and 8 hours, 0 minutes and 0 seconds

5:00:00am Greenwich Mean Time is the sum of the local clock time and the length of time 9:00pm Greenwich Mean Time and 8 hours, 0 minutes and 0 seconds

By calculation (generator: ["local_time_equivalent@trueknowledge.com"]) I know that:

9:00pm Pacific Standard Time is equivalent to the local clock time 5:00:00am Greenwich Mean Time

9:00pm Pacific Standard Time is equivalent to the local clock time 5:00:00am Greenwich Mean Time

Greenwich Mean Time
is the time zone specified in
5:00:00am Greenwich Mean Time

I used the following facts to provide this answer:

-8 hours has been the time zone differential of Pacific Standard Time since at least August 20th 2010, 15:32:53

+0 hours has been the time zone differential of Greenwich Mean Time since at least August 20th 2010, 15:32:46

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