you can't actually measure the kilogramme, and you can't measure the metre because they are the platonic
for - constructed reality - symbolosphere - can't measure an actual kilogram or meter because they are ideal, platonic objects - source - YouTube - Beyond the perceptual envelope - Royal Institution
Unravelling Constructed Realities
for - constructed nature of science - storytelling - source - YouTube - Beyond the perceptual envelope - Royal Institution
a phenomenon of something beyond our experience, beyond something that we'll ever comprehend, the millions of years and this confluence of forces
for - hyperobject - source - YouTube - Beyond the perceptual envelope - Royal Institution
what science does is undermining or kind of challenging everything we believe to be right or all of our preconceptions about the world are challenged and sometimes completely reversed or revolutionised.
for - adjacency - Deep Humanity - physiosphere - symbolosphere - language - science - preconceptions - hyperobjects - scientific model - prediction - YouTube - Beyond the perceptual envelope - Royal Institution - Deep Humanity BEing journeys - And, not or - example adjacency - between - preconceptions - concepts - scientific model - prediction - Deep Humanity - symbolosphere - physiosphere - language - science - adjacency relationship - Paradoxically, science overlays phenomenological reality with a constructed, symbolic layer - From a Deep Humanity perspective, the physiosphere is overlaid with the symbolosphere - The science narrative of - the deposition of animal remains over hundreds of millions of years make up - the cliffs we experience phenomenologically today - assumes the existence of hyperobjects we have no capacity to directly sense - Science is a process that - pays attention to our phenomenological reality - construct a story using specific concepts to explain the observed general class of phenomena in a consistent and repeatable - and most importantly, can predict new observable phenomena using the symbolic model Hence, science is a predictive activity which - begins in phenomenological reality, - the physiosphere - maps to symbols reality in a scientific model - the symbolosphere - makes new symbolic, predictions about phenomenological reality - and finally makes observations ink our phenomenological reality of the symbolically predicted phenomena to validate or refute - This process alternates between the two parallel worlds we seamlessly inhabit, - the physiosphere and - the symbolosphere - and this explains why achieve is - not either constructed OR discovered, but - is both constructed AND discovered
Several commands (RSET, DATA, QUIT) are specified as not permitting parameters.
That is, they don't accept options, only data arguments. E.g., DATA's argument is the RFC 822 message format with headers and message body.
The model for this is that distinct buffers are provided to hold the types of data objects; that is, there is a reverse-path buffer, a forward-path buffer, and a mail data buffer.
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2.3.1. Mail Objects SMTP transports a mail object. A mail object contains an envelope and content. The SMTP envelope is sent as a series of SMTP protocol units (described in Section 3). It consists of an originator address (to Klensin Standards Track [Page 11] RFC 5321 SMTP October 2008 which error reports should be directed), one or more recipient addresses, and optional protocol extension material
The SMTP envelope is sent as a series of SMTP protocol units (described in Section 3). It consists of
- an originator address (to which error reports should be directed),
MAIL FROM that refers to the originator (a.k.a., reverse path, backward-pointing address) of the request
- one or more recipient addresses,
Multiple RCPT TO for each "to:" rfc822 message header in the mail data (see annotation)
- and optional protocol extension material.
DATA (see below)
(See also envelope-vs-mail tags.)
The third step in the procedure is the DATA command (or some alternative specified in a service extension). DATA <CRLF>
Third part of the envelope: DATA.
When the RFC 822 format ([28], [4]) is being used, the mail data include the header fields such as those named Date, Subject, To, Cc, and From.
This just answered my question regarding the quote from "Postfix: The Definitive Guide":
ENVELOPE ADDRESSES AND MESSAGE HEADERS A common source of confusion for email users is the fact that the To: address in email message headers has nothing to do with where a message is actually delivered. The envelope address controls message delivery. In practice, when you compose a message and provide your MUA with a To: address, your MUA uses that same address as the envelope destination address, but this is not required nor is it always the case. From the MTA’s point of view, message headers are part of the content of an email message. The delivery of a message is determined by the addresses specified during the SMTP conversation. These addresses are the envelope addresses , and they are the only thing that determine where messages go. See Section 2.2.8 later in the chapter for an explanation of the SMTP protocol.
Mailing lists and spam are common examples of when the envelope destination address differs from the To: address of the message headers.
Also an answer to this question.
An SMTP-capable host SHOULD support both the alias and the list models of address expansion for multiple delivery. When a message is delivered or forwarded to each address of an expanded list form, the return address in the envelope ("MAIL FROM:") MUST be changed to be the address of a person or other entity who administers the list. However, in this case, the message header section (RFC 5322 [4]) MUST be left unchanged; in particular, the "From" field of the header section is unaffected.
Another section that serves well to understand the difference between email data and SMTP envelope.
To expand an alias, the recipient mailer simply replaces the pseudo- mailbox address in the envelope with each of the expanded addresses in turn; the rest of the envelope and the message body are left unchanged. The message is then delivered or forwarded to each expanded address.
This annotation explains what this paragraph means and dispels my confusion regarding how 3mails with multiple recipients will get processed (also, SMTP envelope vs mail data).
MS Outlook's "distribution list" is the same as an rfc5321 alias.
The return (backward-pointing) address in the envelope is changed so that all error messages generated by the final deliveries will be returned to a list administrator, not to the message originator, who generally has no control over the contents of the list and will typically find error messages annoying.
MAIL FROM (see annotation) is different from to the mail data's rfc822 From:.If the Klensin Standards Track [Page 19] RFC 5321 SMTP October 2008 recipient is known not to be a deliverable address, the SMTP server returns a 550 reply, typically with a string such as "no such user - " and the mailbox name (other circumstances and reply codes are possible).
Will the entire transaction be canceled? "Transaction" in the name of this a section implies yes, but what if all the recipients are valid?
See replies below but the answer is no; an RCPT command is specified for each recipient in the mail data, these RCPT commands will be evaluated in sequence,, and any SMTP (error) notifications will be sent to the address in the MAIL FROM command (which is not necessarily the same as the mail data's From: header).
Patrick was great
Anderson's theory of Faulting explains some of the faults found in nature but fails to find all types of fault and fault system.
Parabolic failure envelope again as it gets into negative stresses.
At high stresses( opposite of tensile stresses) plastic deformation occurs at high normal stress, shear stress would be independent here. if the differential stress is known you can start to form a composite failure envelope in which the 5 fault types occur at different differential stresses
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