
The most damaging financial decisions don't feel reckless. They feel perfectly logical. This book exposes the reasonable-sounding choices that quietly cost families the most, and how to catch them in yourself.

3DBad financial decisions rarely announce themselves. They arrive dressed as common sense: paying off the wrong debt first, holding too much cash, avoiding insurance because nothing has happened yet, chasing a 'sure thing,' or treating a complex problem with a simple rule. Each feels prudent in the moment. Each is a predictable error that behavioural finance has named, and that costs families dearly precisely because it doesn't feel like a mistake.
Perfectly Logical is a tour of the reasonable-sounding decisions that quietly do the most damage. It draws on behavioural finance to reveal the biases behind them, walks through the specific 'logical' choices that most often backfire, and gives you a practical defence, the questions and habits that catch a comfortable error before it becomes an expensive one.
Decisions that feel safe, like hoarding cash, quietly erode wealth.
'Nothing has gone wrong yet' is treated as proof nothing will.
Complex situations get one-size rules that don't fit them.
Smart people trust their judgement most exactly where bias hides.
Group One: Accumulation Biases
The Financial Bias Architecture
The Advisor’s Bias Map
What a Bias Really Costs
From Awareness to ArchitectureIt's not about being foolish, it's about being human. The smartest readers benefit most, because intelligence is no defence against bias; awareness is. Read it on your own decisions, not just others'.
“The decisions that cost families most never feel reckless. They feel perfectly logical.”Dr. Sanjay Tolani
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