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Description
Predictably Irrational**** Condition: BRAND NEW ISBN: 9780007256532 Format: B format paperback Year: 2019 Publisher: HarperCollins Publishers Pages: 304 Description: Why do smart people make irrational decisions every day? The answers will surprise you. PREDICTABLY IRRATIONAL is an intriguing, witty and utterly original look at why we all make illogical decisions. Why can a 50p aspirin do what a 5p aspirin can't? If an item is "free" it must be a bargain, right? Why is
****Condition: BRAND NEW
ISBN: 9780007256532
Format: B-format paperback
Year: 2019
Publisher: HarperCollins Publishers
Pages: 304
Description:
Why do smart people make irrational decisions every day? The answers will surprise you. PREDICTABLY IRRATIONAL is an intriguing, witty and utterly original look at why we all make illogical decisions.
Why can a 50p aspirin do what a 5p aspirin can't? If an item is "free" it must be a bargain, right? Why is everything relative, even when it shouldn't be? How do our expectations influence our actual opinions and decisions?
In this astounding book, behavioural economist Dan Ariely cuts to the heart of our strange behaviour, demonstrating how irrationality often supplants rational thought and that the reason for this is embedded in the very structure of our minds.
Predicatably Irrational brilliantly blends everyday experiences with a series of illuminating and often surprising experiments, that will change your understanding of human behaviour. And, by recognising these patterns, Ariely shows that we can make better decisions in business, in matters of collective welfare, and in our everyday lives from drinking coffee to losing weight, buying a car to choosing a romantic partner.
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4.6 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
Eliminated continual bad breath and some thrush
I’ll keep this short - I’ve had oral thrush since taking antibiotics years ago. My breath was always good though so I never cared much (though I do eat probiotic-rich foods whenever I can). Lately, I started developing a gross taste in my mouth that and my wife was saying my breathe wasn’t great - not a fun thing to hear. I tried mouthwashes, general probiotics, oil of oregano, etc...nothing worked.
I bought these on a whim and began taking them just 5 days or so, my breathe is no longer bad. The thrush has minimized as well, though is still present toward my the back of my tongue. Amazing.
I don’t write reviews and wasn’t paid to do so for this product - just bought randomly, hoping it’d help, and it did. I’m sure it won’t work for everyone since everyone’s body is different, as are the reasons you might be experiencing bad breath, but for me, this is amazing.
BY THE WAY: I see reviews saying they took these like pills. That’s not going to work, you have to let them completely dissolve I. Your mouth as the instructions say!
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Reviewed in the United States on June 25, 2021
★★★★★ 5
A Lifesaver for Dry Mouth, Without That Weird Aftertaste 👏
Size: 4.3 Ounce (Pack of 1)
If you know, you know: dry mouth is not just an inconvenience, it’s downright uncomfortable. I’ve tried several brands over the years, but Biotène is the one that consistently keeps my mouth feeling fresh without that overpowering artificial mint or gritty texture.
This formula is gentle but effective, no burning, no foamy overload, and no funky aftertaste. It’s also a huge win that it’s sulfate-free and doesn’t irritate my gums like some drugstore pastes do. The mint is subtle but refreshing, and my mouth actually feels hydrated afterward (which is wild to say about a toothpaste, but here we are).
If you deal with dry mouth from medication, menopause, or just bad luck, this one’s worth every penny.
✨ Pro tip: Keep a travel size in your bag if you’re heading out for the day. Nothing ruins a coffee date like feeling like your tongue is made of sandpaper.
10/10 recommend.
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Reviewed in the United States on July 16, 2025
★★★★★ 5
Dry Mouth
Size: 4.3 Ounce (Pack of 1)
I have been diagnosed with Dry Mouth, what a problem this is! My dentist recommended toothpaste for dry mouth; I selected Biotene Fluoride toothpaste for daily use. I definitely use it at night before going to bed to help keep my mouth less dry. I also use Biotene mouth wash and other products that I'll rate another time. I love this toothpaste; I believe it's helpful for my diagnosis.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Biotène Fluoride Toothpaste for Dry Mouth Symptoms
Size: 4.3 Ounce (Pack of 1)
I have been using this toothpaste on and off for a few years ever since I got a dry mouth. It is very good and leaves your mouth feeling fresh. Unfortunately it doesn't get rid of your dry mouth.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Chemical free is important
Size: 4.3 Ounce (Pack of 1)
I don’t like doing fluoride, but I do know that some fluoride is important so this is the cleanest fluoride toothpaste I could find and I use it in conjunction with a non-fluoride toothpaste I have I love the flavor. I love the fact that it doesn’t have a lot of the bad chemicals in it.
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Reviewed in the United States on May 8, 2026