You would say that

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a nascent theory of professional legal advice.

A private practitioners greatest fear is a bright-line. Any opportunity to to blur the edges of old white line is an opportunity to extemporise on a client dine whilst taking little or no risk and whilst subjecting oneself to little or no criticism.

So, for example, we are told that institutional big boy letters should be effective at disclaiming liability for prospectuses at least when selling too sophisticated institutional clients.

See also

• Qiix
• Big-boy letter

Inclined to be supportive