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		<updated>2026-05-23T16:16:11Z</updated>
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	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=Talk:1935:_2018&amp;diff=149971</id>
		<title>Talk:1935: 2018</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=Talk:1935:_2018&amp;diff=149971"/>
				<updated>2017-12-29T21:04:12Z</updated>
		
		<summary type="html">&lt;p&gt;Sirpent: /* Theory for possible explanation */ new section&lt;/p&gt;
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&lt;div&gt;&amp;lt;!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.--&amp;gt;&lt;br /&gt;
This is easy! Don't factor it - just multiply by 25 and if that ends in two zeros, but not four zeros then it's a leap year, at least most of the time.....17:25, 29 December 2017 (UTC) {{unsigned ip|162.158.126.112}}&lt;br /&gt;
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This is easy! Don’t factor it - just convert it into a binary and look at the 2 least significant bits. If they are 00 the number is multiple of four. —[[Special:Contributions/172.69.33.35|172.69.33.35]] 17:37, 29 December 2017 (UTC)&lt;br /&gt;
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This is easy! Don't factor it - just subtract 4 repeatedly. If you end up at 0, it's divisible. If you end up at 1, 2, or 3, it's not. -- 17:55, 29 December 2017 (UTC){{unsigned ip|172.68.58.167}}&lt;br /&gt;
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The calculation of Christmas is trivial{{Citation needed}} it's December 25th. Where as the calculation of Easter is complex ([https://en.wikipedia.org/wiki/Computus]). [[Special:Contributions/172.68.133.18|172.68.133.18]] 18:03, 29 December 2017 (UTC)&lt;br /&gt;
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;Title text explanation mis-read&lt;br /&gt;
Explanation of title text is incorrect: &amp;quot;The title text refers to calculating the date of Christmas; again, this is a trivial exercise, because Christmas is always December 25.&amp;quot; Title text states 'day of Christmas', not 'date...'. The day changes each year and so does require calculation. {{unsigned ip|162.158.111.73}}&lt;br /&gt;
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Oops, my bad. Fixed. [[User:FlyingPiMonster|FlyingPiMonster]] ([[User talk:FlyingPiMonster|talk]]) 18:08, 29 December 2017 (UTC)&lt;br /&gt;
* I think you have it backwards. The title text is a reference to calculating the day (as in &amp;quot;date&amp;quot;, not &amp;quot;day of week&amp;quot;) of Easter. This is a non-trivial calculation (though one that modern computers can perform easily). On the other hand, the Christmas day is fixed. (There's no reason to believe that the joke was anything else.) - [[User:Mike Rosoft|Mike Rosoft]] ([[User talk:Mike Rosoft|talk]]) 19:13, 29 December 2017 (UTC)&lt;br /&gt;
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I don't know who wrote the explanation, but...  Are they having a bad day? [[Special:Contributions/162.158.111.205|162.158.111.205]] 18:44, 29 December 2017 (UTC)&lt;br /&gt;
:That was vandalism. I did a revert. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 19:06, 29 December 2017 (UTC)&lt;br /&gt;
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:Also, Megan understands that checking if a number divisible by 2 is easy [[Special:Contributions/141.101.77.50|141.101.77.50]] 19:32, 29 December 2017 (UTC)&lt;br /&gt;
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== Theory for possible explanation ==&lt;br /&gt;
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Didn't want to edit this in because I'm not sure- but the motivation for this uncharacteristic lack of mathematical rigor could have to do with the current trend of people being dismissive of science being able to predict things. Something that seems pretty obvious is made to look like a chance event that nobody can really predict ahead of time.&lt;/div&gt;</summary>
		<author><name>Sirpent</name></author>	</entry>

	<entry>
		<id>https://www.explainxkcd.com/wiki/index.php?title=1896:_Active_Ingredients_Only&amp;diff=146100</id>
		<title>1896: Active Ingredients Only</title>
		<link rel="alternate" type="text/html" href="https://www.explainxkcd.com/wiki/index.php?title=1896:_Active_Ingredients_Only&amp;diff=146100"/>
				<updated>2017-09-29T20:01:27Z</updated>
		
		<summary type="html">&lt;p&gt;Sirpent: /* Explanation */&lt;/p&gt;
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&lt;div&gt;{{comic&lt;br /&gt;
| number    = 1896&lt;br /&gt;
| date      = September 29, 2017&lt;br /&gt;
| title     = Active Ingredients Only&lt;br /&gt;
| image     = active_ingredients_only.png&lt;br /&gt;
| titletext = Contains the active ingredients from all competing cold medicines, plus the medicines for headaches, arthritis, insomnia, indigestion, and more, because who wants THOSE things?&lt;br /&gt;
}}&lt;br /&gt;
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==Explanation==&lt;br /&gt;
{{incomplete|Created by a GUY - Please change this comment when editing this page. Do NOT delete this tag too soon.}}&lt;br /&gt;
This comic is a reference to how all medicine typically has one (or a few) &amp;quot;Active&amp;quot; ingredient and many &amp;quot;Inactive&amp;quot; ingredients.&lt;br /&gt;
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[[Randall]] thus presents a pack of {{w|Common cold|cold}} medicine that jokingly has &amp;quot;Active Ingredients Only&amp;quot;, which is the name of the brand as can be seen since it has &amp;quot;™&amp;quot; after the name. It has six active ingredients and no inactive ingredients. All this because ''We're not here to waste your time'', their slogan, which is also trademarked. Interestingly, the slogan is a registered trademark while the product name is a common law trademark. This means that the slogan likely stays the same, while the product name changes from time to time.&lt;br /&gt;
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Since one of the inactive ingredients in any medicine in tablet form would be {{w|Binder (material)|binders}} that keep the tablet together, and keep the active ingredient(s) inside, it could be a serious problem to take this cold medicine. Though this packaging is commonly blister packs, with each dose contained seperatly. Opening the box would reveal a mix of various colored powders and no way to ensure you are correctly taking the right dose. In fact, it would be extremely easy to overdose yourself on one or more of the active ingredients.&lt;br /&gt;
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The title text says that it contains the active ingredients from all competing cold medicines, as well as almost every other medicine on the market for ''headaches, arthritis, insomnia, indigestion and more''. Some of these other conditions, but not all, often occur when you have a cold. This is in line with the &amp;quot;don't waste your time&amp;quot; slogan, since you then need to use only one cold medicine. This may be  be a follow-up (or a wish from Randall) after [[1618: Cold Medicine]], where [[Cueball]] wishes to try all possible types of cold medicine at once. Note that, with this list, there should be more than those six active ingredients in the medicine than only those listed on the pack.&lt;br /&gt;
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It correctly states that, apart from the cold you are trying to get rid of, you also do not want these &amp;quot;other things&amp;quot;. But it is not advisable to take too much medicine, and often you are warned not to mix different types at the same time, or at least should ask your doctor first. This cold medicine violates these rules, which is the main joke.&lt;br /&gt;
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Another joke is that taking any cold medicine has no effect on the cold itself, but instead treats some of the symptoms. So if you are going to go through all types of cold medicine to no avail anyway, you might as well get it over with by taking them all at once, saving some time.&lt;br /&gt;
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==Transcript==&lt;br /&gt;
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:[A picture of a pack of cold medicine. At the top there is a large advert in three lines. In a black line, to the right of the advert, white text states what kind of medicine is in the pack. Below to the left is a square frame listing ingredients. Most of the text inside this frame is unreadable scribbles. To the right of the frame is another advert inside a black frame. On the side of the box are also unreadable scribbles, both at the top and down next to the ingredients list. At the bottom of the box it can be seen how the pack can open up.]&lt;br /&gt;
:&amp;lt;big&amp;gt;Active Ingredients&amp;lt;/big&amp;gt;&lt;br /&gt;
:&amp;lt;big&amp;gt;&amp;lt;big&amp;gt;'''Only'''&amp;lt;/big&amp;gt;&amp;lt;/big&amp;gt;&amp;lt;sup&amp;gt;TM&amp;lt;/sup&amp;gt;&lt;br /&gt;
:We're not here to waste your time®&lt;br /&gt;
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:Cold Medicine&lt;br /&gt;
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:Active ingredients&lt;br /&gt;
:[Six lines of scribbles, with first a name, then a statement in brackets and finally a column right of this with a short line of scribbles.]&lt;br /&gt;
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:Inactive ingredients&lt;br /&gt;
:None&lt;br /&gt;
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:&amp;lt;big&amp;gt;No binders!&amp;lt;/big&amp;gt;&lt;br /&gt;
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{{comic discussion}}&lt;/div&gt;</summary>
		<author><name>Sirpent</name></author>	</entry>

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