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Psionics in Tasha
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<blockquote data-quote="see" data-source="post: 8103032" data-attributes="member: 10531"><p>No, it doesn't, that's just one more misinterpretation of the expression.</p><p></p><p>The origination of the saying is a worn-down translation of the medieval Latin "exceptio probat regulam in casibus non exceptis" principle of legal construction, which, translated fully, would be "the exception proves the rule <em>in cases not excepted</em>". So a sign that says "Parking prohibited on Sundays" is proof of a general rule "parking usually allowed", because you would not need to post an exception for Sundays unless that were the general rule. This contrasts with the rules of formal logic, where "Parking prohibited on Sundays" tells you nothing about parking on Mondays.</p><p></p><p>It is true that "probat" can be translated as "tests" rather than "proves", but that doesn't make any sense when you add the "in casibus non exceptis" from the original phrase.</p><p></p><p>Applied to the 5e <em>Monster Manual</em>, that principle of construction would say that since "no components" is called out as an exception in each monster's individual case, that proves the underlying default rule is that "Innate Spellcasting (Psionics)" requires components. On the other hand, the usual approach from inductive logic is that when every example of X has feature Y, you assume Y is a general feature of all X.</p><p></p><p>Either approach would be equally valid, except that we have a specific statement on p.10 of the book saying that "A monster that has this tag typically doesn't require any components to cast its spells", which specifically informs you that it's merely typical for monsters with "Innate Spellcasting (Psionics)" to not need components, not that it's a universal rule of psionics.</p></blockquote><p></p>
[QUOTE="see, post: 8103032, member: 10531"] No, it doesn't, that's just one more misinterpretation of the expression. The origination of the saying is a worn-down translation of the medieval Latin "exceptio probat regulam in casibus non exceptis" principle of legal construction, which, translated fully, would be "the exception proves the rule [I]in cases not excepted[/I]". So a sign that says "Parking prohibited on Sundays" is proof of a general rule "parking usually allowed", because you would not need to post an exception for Sundays unless that were the general rule. This contrasts with the rules of formal logic, where "Parking prohibited on Sundays" tells you nothing about parking on Mondays. It is true that "probat" can be translated as "tests" rather than "proves", but that doesn't make any sense when you add the "in casibus non exceptis" from the original phrase. Applied to the 5e [I]Monster Manual[/I], that principle of construction would say that since "no components" is called out as an exception in each monster's individual case, that proves the underlying default rule is that "Innate Spellcasting (Psionics)" requires components. On the other hand, the usual approach from inductive logic is that when every example of X has feature Y, you assume Y is a general feature of all X. Either approach would be equally valid, except that we have a specific statement on p.10 of the book saying that "A monster that has this tag typically doesn't require any components to cast its spells", which specifically informs you that it's merely typical for monsters with "Innate Spellcasting (Psionics)" to not need components, not that it's a universal rule of psionics. [/QUOTE]
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