Archive for the ‘Uncategorized’ Category

Duction

Friday, September 9th, 2016

Duction

Inductive Reasoning in Logic

From Encyclopedia Britannica 1955 ed.:

Reasoning in support of a general proposition by consideration of particular cases which fall under it. Aristotle calls induction “a passage from individuals to universals.”

Examples:

Deductive Reasoning in Logic

deduct - To lead out from

A rigorous proof or derivation, of one statement (the conclusion) from one or more statements (the premisses); i.e, a chain of statements, each of which is either a premiss or follows from a statement occurring earlier in the proof. If "A "follows from " B in the sense intended, the conjunction of B and the negation of A (in sumbols, B.~A) must be self-contradictory-a condition that does not apply to induction. (Buan adequate analysis of what is meant by “following from” or “being rigorously implied by” is a difficult technical problem.) This modern use of “deduction” is a generalization of Aristotle’s syllogismos (in Prior Analytics). But a syllogism (q.v.) is now recognized to be merely a special case of a decuction. Also the traditional view that decduction proceeds “from the general to the specific” or “from the universal to the particular” has been abandoned as incorrect by most logicians. Some experts regard all valid inference as deductive in form, and for this and other reasons reject the supposed contrast between deduction and induction.

From the logs: http://btcbase.org/log/2016-03-29#1441833

Examples:

Reductive Reasoning

Thortron

Sunday, August 28th, 2016

Introducing the Thortron-78

I read about the Z80 in the logs and decided to build a computer using one. I ended up constructing from basic components a 5V power supply, a computer consisting of a 4 Mhz clock, Z80 CPU, an eeprom, and a video board based on the TMS9118.

Here is the whole set up:

Here is the actual computer with the logic analyzer probe attached to the CPU:

Here is the computer displaying its name (sadly in gray scale because of an as yet unsolved issue with color loss):

Here is the HP logic analyzer that saved me a good deal of time, and which was according to some labeling on it once used at Fermilab:

The current state of the project is that the computer (I call it the Thortron-78) can drive a TMS9118 VDP well enough to display text on a TV via composite video. Next up is RAM, keyboard i/o, and then some type of storage.

Numbered Lists

Sunday, August 28th, 2016

Against Numbered Lists

I am often exposed to “articles” in the form of numbered lists. I will not read them. A numbered list of lightly supported claims is in no way mnemonic, and in fact a sign of information to be quickly discarded. The only numbered lists I will read are ordered enumerations of menial tasks, or perhaps recipes.

Greek

Sunday, August 28th, 2016

English is a collection of once glittering but now dead moths and butterflies pinned and under glass.

If Greek seems to English speakers a dead language it is only because they’ve seen only that part of it that has been trapped in a jar, gassed, and impaled in an English dictionary.

English speakers are entomolgists, presenting their collection of Chloroformed specimens in various combinations mimicking the ecosystems from which they originated.