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Notwithstanding¡¡the¡¡fact¡¡that¡¡the¡¡grounds¡¡of¡¡legal¡¡liability¡¡are¡¡moral¡¡to¡¡the¡¡extent¡¡above¡¡explained£»¡¡it¡¡must¡¡be¡¡borne¡¡in¡¡mind¡¡that¡¡law¡¡only¡¡works¡¡within¡¡the¡¡sphere¡¡of¡¡the¡¡senses¡£¡¡If¡¡the¡¡external¡¡phenomena£»¡¡the¡¡manifest¡¡acts¡¡and¡¡omissions£»¡¡are¡¡such¡¡as¡¡it¡¡requires£»¡¡it¡¡is¡¡wholly¡¡indifferent¡¡to¡¡the¡¡internal¡¡phenomena¡¡of¡¡conscience¡£¡¡A¡¡man¡¡may¡¡have¡¡as¡¡bad¡¡a¡¡heart¡¡as¡¡he¡¡chooses£»¡¡if¡¡his¡¡conduct¡¡is¡¡within¡¡the¡¡rules¡£¡¡In¡¡other¡¡words£»¡¡the¡¡standards¡¡of¡¡the¡¡law¡¡are¡¡external¡¡standards£»¡¡and£»¡¡however¡¡much¡¡it¡¡may¡¡take¡¡moral¡¡considerations¡¡into¡¡account£»¡¡it¡¡does¡¡so¡¡only¡¡for¡¡the¡¡purpose¡¡of¡¡drawing¡¡a¡¡line¡¡between¡¡such¡¡bodily¡¡motions¡¡and¡¡rests¡¡as¡¡it¡¡permits£»¡¡and¡¡such¡¡as¡¡it¡¡does¡¡not¡£¡¡What¡¡the¡¡law¡¡really¡¡forbids£»¡¡and¡¡the¡¡only¡¡thing¡¡it¡¡forbids£»¡¡is¡¡the¡¡act¡¡on¡¡the¡¡wrong¡¡side¡¡of¡¡the¡¡line£»¡¡be¡¡that¡¡act¡¡blameworthy¡¡or¡¡otherwise¡£
Again£»¡¡any¡¡legal¡¡standard¡¡must£»¡¡in¡¡theory£»¡¡be¡¡one¡¡which¡¡would¡¡apply¡¡to¡¡all¡¡men£»¡¡not¡¡specially¡¡excepted£»¡¡under¡¡the¡¡same¡¡circumstances¡£¡¡It¡¡is¡¡not¡¡intended¡¡that¡¡the¡¡public¡¡force¡¡should¡¡fall¡¡upon¡¡an¡¡individual¡¡accidentally£»¡¡or¡¡at¡¡the¡¡whim¡¡of¡¡any¡¡body¡¡of¡¡men¡£¡¡The¡¡standard£»¡¡that¡¡is£»¡¡£§111£§¡¡must¡¡be¡¡fixed¡£¡¡In¡¡practice£»¡¡no¡¡doubt£»¡¡one¡¡man¡¡may¡¡have¡¡to¡¡pay¡¡and¡¡another¡¡may¡¡escape£»¡¡according¡¡to¡¡the¡¡different¡¡feelings¡¡of¡¡different¡¡juries¡£¡¡But¡¡this¡¡merely¡¡shows¡¡that¡¡the¡¡law¡¡does¡¡not¡¡perfectly¡¡accomplish¡¡its¡¡ends¡£¡¡The¡¡theory¡¡or¡¡intention¡¡of¡¡the¡¡law¡¡is¡¡not¡¡that¡¡the¡¡feeling¡¡of¡¡approbation¡¡or¡¡blame¡¡which¡¡a¡¡particular¡¡twelve¡¡may¡¡entertain¡¡should¡¡be¡¡the¡¡criterion¡£¡¡They¡¡are¡¡supposed¡¡to¡¡leave¡¡their¡¡idiosyncrasies¡¡on¡¡one¡¡side£»¡¡and¡¡to¡¡represent¡¡the¡¡feeling¡¡of¡¡the¡¡community¡£¡¡The¡¡ideal¡¡average¡¡prudent¡¡man£»¡¡whose¡¡equivalent¡¡the¡¡jury¡¡is¡¡taken¡¡to¡¡be¡¡in¡¡many¡¡cases£»¡¡and¡¡whose¡¡culpability¡¡or¡¡innocence¡¡is¡¡the¡¡supposed¡¡test£»¡¡is¡¡a¡¡constant£»¡¡and¡¡his¡¡conduct¡¡under¡¡given¡¡circumstances¡¡is¡¡theoretically¡¡always¡¡the¡¡same¡£
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If£»¡¡now£»¡¡the¡¡ordinary¡¡liabilities¡¡in¡¡tort¡¡arise¡¡from¡¡failure¡¡to¡¡comply¡¡with¡¡fixed¡¡and¡¡uniform¡¡standards¡¡of¡¡external¡¡conduct£»¡¡which¡¡every¡¡man¡¡is¡¡presumed¡¡and¡¡required¡¡to¡¡know£»¡¡it¡¡is¡¡obvious¡¡that¡¡it¡¡ought¡¡to¡¡be¡¡possible£»¡¡sooner¡¡or¡¡later£»¡¡to¡¡formulate¡¡these¡¡standards¡¡at¡¡least¡¡to¡¡some¡¡extent£»¡¡and¡¡that¡¡to¡¡do¡¡so¡¡must¡¡at¡¡last¡¡be¡¡the¡¡business¡¡of¡¡the¡¡court¡£¡¡It¡¡is¡¡equally¡¡clear¡¡that¡¡the¡¡featureless¡¡generality£»¡¡that¡¡the¡¡defendant¡¡was¡¡bound¡¡to¡¡use¡¡such¡¡care¡¡as¡¡a¡¡prudent¡¡man¡¡would¡¡do¡¡under¡¡the¡¡circumstances£»¡¡ought¡¡to¡¡be¡¡continually¡¡giving¡¡place¡¡to¡¡the¡¡specific¡¡one£»¡¡that¡¡he¡¡was¡¡bound¡¡to¡¡use¡¡this¡¡or¡¡that¡¡precaution¡¡under¡¡these¡¡or¡¡those¡¡circumstances¡£¡¡The¡¡standard¡¡which¡¡the¡¡defendant¡¡was¡¡bound¡¡to¡¡come¡¡up¡¡to¡¡was¡¡a¡¡standard¡¡of¡¡specific¡¡acts¡¡or¡¡omissions£»¡¡with¡¡reference¡¡to¡¡the¡¡specific¡¡circumstances¡¡in¡¡which¡¡he¡¡found¡¡himself¡£¡¡If¡¡in¡¡the¡¡whole¡¡department¡¡of¡¡£§112£§¡¡unintentional¡¡wrongs¡¡the¡¡courts¡¡arrived¡¡at¡¡no¡¡further¡¡utterance¡¡than¡¡the¡¡question¡¡of¡¡negligence£»¡¡and¡¡left¡¡every¡¡case£»¡¡without¡¡rudder¡¡or¡¡compass£»¡¡to¡¡the¡¡jury£»¡¡they¡¡would¡¡simply¡¡confess¡¡their¡¡inability¡¡to¡¡state¡¡a¡¡very¡¡large¡¡part¡¡of¡¡the¡¡law¡¡which¡¡they¡¡required¡¡the¡¡defendant¡¡to¡¡know£»¡¡and¡¡would¡¡assert£»¡¡by¡¡implication£»¡¡that¡¡nothing¡¡could¡¡be¡¡learned¡¡by¡¡experience¡£¡¡But¡¡neither¡¡courts¡¡nor¡¡legislatures¡¡have¡¡ever¡¡stopped¡¡at¡¡that¡¡point¡£
¡·From¡¡the¡¡time¡¡of¡¡Alfred¡¡to¡¡the¡¡present¡¡day£»¡¡statutes¡¡and¡¡decisions¡¡have¡¡busied¡¡themselves¡¡with¡¡defining¡¡the¡¡precautions¡¡to¡¡be¡¡taken¡¡in¡¡certain¡¡familiar¡¡cases£»¡¡that¡¡is£»¡¡with¡¡substituting¡¡for¡¡the¡¡vague¡¡test¡¡of¡¡the¡¡care¡¡exercised¡¡by¡¡a¡¡prudent¡¡man£»¡¡a¡¡precise¡¡one¡¡of¡¡specific¡¡acts¡¡or¡¡omissions¡£¡¡The¡¡fundamental¡¡thought¡¡is¡¡still¡¡the¡¡same£»¡¡that¡¡the¡¡way¡¡prescribed¡¡is¡¡that¡¡in¡¡which¡¡prudent¡¡men¡¡are¡¡in¡¡the¡¡habit¡¡of¡¡acting£»¡¡or¡¡else¡¡is¡¡one¡¡laid¡¡down¡¡for¡¡cases¡¡where¡¡prudent¡¡men¡¡might¡¡otherwise¡¡be¡¡in¡¡doubt¡£
It¡¡will¡¡be¡¡observed¡¡that¡¡the¡¡existence¡¡of¡¡the¡¡external¡¡tests¡¡of¡¡liability¡¡which¡¡will¡¡be¡¡mentioned£»¡¡while¡¡it¡¡illustrates¡¡the¡¡tendency¡¡of¡¡the¡¡law¡¡of¡¡tort¡¡to¡¡become¡¡more¡¡and¡¡more¡¡concrete¡¡by¡¡judicial¡¡decision¡¡and¡¡by¡¡statute£»¡¡does¡¡not¡¡interfere¡¡with¡¡the¡¡general¡¡doctrine¡¡maintained¡¡as¡¡to¡¡the¡¡grounds¡¡of¡¡liability¡£¡¡The¡¡argument¡¡of¡¡this¡¡Lecture£»¡¡although¡¡opposed¡¡to¡¡the¡¡doctrine¡¡that¡¡a¡¡man¡¡acts¡¡or¡¡exerts¡¡force¡¡at¡¡his¡¡peril£»¡¡is¡¡by¡¡no¡¡means¡¡opposed¡¡to¡¡the¡¡doctrine¡¡that¡¡he¡¡does¡¡certain¡¡particular¡¡acts¡¡at¡¡his¡¡peril¡£¡¡It¡¡is¡¡the¡¡coarseness£»¡¡not¡¡the¡¡nature£»¡¡of¡¡the¡¡standard¡¡which¡¡is¡¡objected¡¡to¡£¡¡If£»¡¡when¡¡the¡¡question¡¡of¡¡the¡¡defendant's¡¡negligence¡¡is¡¡left¡¡to¡¡a¡¡jury£»¡¡negligence¡¡does¡¡not¡¡mean¡¡the¡¡actual¡¡state¡¡of¡¡the¡¡defendant's¡¡mind£»¡¡but¡¡a¡¡failure¡¡to¡¡act¡¡as¡¡a¡¡prudent¡¡man¡¡of¡¡average¡¡intelligence¡¡would¡¡have¡¡done£»¡¡he¡¡is¡¡required¡¡to¡¡conform¡¡to¡¡an¡¡objective¡¡standard¡¡at¡¡his¡¡£§113£§¡¡peril£»¡¡even¡¡in¡¡that¡¡case¡£¡¡When¡¡a¡¡more¡¡exact¡¡and¡¡specific¡¡rule¡¡has¡¡been¡¡arrived¡¡at£»¡¡he¡¡must¡¡obey¡¡that¡¡rule¡¡at¡¡his¡¡peril¡¡to¡¡the¡¡same¡¡extent¡£¡¡But£»¡¡further£»¡¡if¡¡the¡¡law¡¡is¡¡wholly¡¡a¡¡standard¡¡of¡¡external¡¡conduct£»¡¡a¡¡man¡¡must¡¡always¡¡comply¡¡with¡¡that¡¡standard¡¡at¡¡his¡¡peril¡£
Some¡¡examples¡¡of¡¡the¡¡process¡¡of¡¡specification¡¡will¡¡be¡¡useful¡£¡¡In¡¡LL¡£¡¡Alfred£»¡¡36£»¡¡/1/¡¡providing¡¡for¡¡the¡¡case¡¡of¡¡a¡¡man's¡¡staking¡¡himself¡¡on¡¡a¡¡spear¡¡carried¡¡by¡¡another£»¡¡we¡¡read£»¡¡¡¨Let¡¡this¡¡£¨liability£©¡¡be¡¡if¡¡the¡¡point¡¡be¡¡three¡¡fingers¡¡higher¡¡than¡¡the¡¡hindmost¡¡part¡¡of¡¡the¡¡shaft£»¡¡if¡¡they¡¡be¡¡both¡¡on¡¡a¡¡level£»¡¡¡£¡£¡£¡¡be¡¡that¡¡without¡¡danger¡£¡¨
The¡¡rule¡¡of¡¡the¡¡road¡¡and¡¡the¡¡sailing¡¡rules¡¡adopted¡¡by¡¡Congress¡¡from¡¡England¡¡are¡¡modern¡¡examples¡¡of¡¡such¡¡statutes¡£¡¡By¡¡the¡¡former¡¡rule£»¡¡the¡¡question¡¡has¡¡been¡¡narrowed¡¡from¡¡the¡¡vague¡¡one£»¡¡Was¡¡the¡¡party¡¡negligent£¿¡¡to¡¡the¡¡precise¡¡one£»¡¡Was¡¡he¡¡on¡¡the¡¡right¡¡or¡¡left¡¡of¡¡the¡¡road£¿¡¡To¡¡avoid¡¡a¡¡possible¡¡misconception£»¡¡it¡¡may¡¡be¡¡observed¡¡that£»¡¡of¡¡course£»¡¡this¡¡question¡¡does¡¡not¡¡necessarily¡¡and¡¡under¡¡all¡¡circumstances¡¡decide¡¡that¡¡of¡¡liability£»¡¡a¡¡plaintiff¡¡may¡¡have¡¡been¡¡on¡¡the¡¡wrong¡¡side¡¡of¡¡the¡¡road£»¡¡as¡¡he¡¡may¡¡have¡¡been¡¡negligent£»¡¡and¡¡yet¡¡the¡¡conduct¡¡of¡¡the¡¡defendant¡¡may¡¡have¡¡been¡¡unjustifiable£»¡¡and¡¡a¡¡ground¡¡of¡¡liability¡£¡¡/2/¡¡So£»¡¡no¡¡doubt£»¡¡a¡¡defendant¡¡could¡¡justify¡¡or¡¡excuse¡¡being¡¡on¡¡the¡¡wrong¡¡side£»¡¡under¡¡some¡¡circumstances¡£¡¡The¡¡difference¡¡between¡¡alleging¡¡that¡¡a¡¡defendant¡¡was¡¡on¡¡the¡¡wrong¡¡side¡¡of¡¡the¡¡road£»¡¡and¡¡that¡¡he¡¡was¡¡negligent£»¡¡is¡¡the¡¡difference¡¡between¡¡an¡¡allegation¡¡of¡¡facts¡¡requiring¡¡to¡¡be¡¡excused¡¡by¡¡a¡¡counter¡¡allegation¡¡of¡¡further¡¡facts¡¡to¡¡prevent¡¡their¡¡being¡¡a¡¡ground¡¡of¡¡liability£»¡¡and¡¡an¡¡allegation¡¡which¡¡involves¡¡a¡¡conclusion¡¡of¡¡law£»¡¡and¡¡denies¡¡in¡¡advance¡¡the¡¡existence¡¡of¡¡an¡¡£§114£§¡¡excuse¡£¡¡Whether¡¡the¡¡former¡¡allegation¡¡ought¡¡not¡¡to¡¡be¡¡enough£»¡¡and¡¡whether¡¡the¡¡establishment¡¡of¡¡the¡¡fact¡¡ought¡¡not¡¡to¡¡shift¡¡the¡¡burden¡¡of¡¡proof£»¡¡are¡¡questions¡¡which¡¡belong¡¡to¡¡the¡¡theory¡¡of¡¡pleading¡¡and¡¡evidence£»¡¡and¡¡could¡¡be¡¡answered¡¡either¡¡way¡¡consistently¡¡with¡¡analogy¡£¡¡I¡¡should¡¡have¡¡no¡¡difficulty¡¡in¡¡saying¡¡that¡¡the¡¡allegation¡¡of¡¡facts¡¡which¡¡are¡¡ordinarily¡¡a¡¡ground¡¡of¡¡liability£»¡¡and¡¡which¡¡would¡¡be¡¡so¡¡unless¡¡excused£»¡¡ought¡¡to¡¡be¡¡sufficient¡£¡¡But¡¡the¡¡forms¡¡of¡¡the¡¡law£»¡¡especially¡¡the¡¡forms¡¡of¡¡pleading£»¡¡do¡¡not¡¡change¡¡with¡¡every¡¡change¡¡of¡¡its¡¡substance£»¡¡and¡¡a¡¡prudent¡¡lawyer¡¡would¡¡use¡¡the¡¡broader¡¡and¡¡safer¡¡phrase¡£
The¡¡same¡¡course¡¡of¡¡specification¡¡which¡¡has¡¡been¡¡illustrated¡¡from¡¡the¡¡statute¡¡¡book¡¡ought¡¡also¡¡to¡¡be¡¡taking¡¡place¡¡in¡¡the¡¡growth¡¡of¡¡judicial¡¡decisions¡£¡¡That¡¡this¡¡should¡¡happen¡¡is¡¡in¡¡accordance¡¡with¡¡the¡¡past¡¡history¡¡of¡¡the¡¡law¡£¡¡It¡¡has¡¡been¡¡suggested¡¡already¡¡that¡¡in¡¡the¡¡days¡¡of¡¡the¡¡assize¡¡and¡¡jurata¡¡the¡¡court¡¡decided¡¡whether¡¡the¡¡facts¡¡constituted¡¡a¡¡ground¡¡of¡¡liability¡¡in¡¡all¡¡ordinary¡¡cases¡£¡¡A¡¡question¡¡of¡¡negligence¡¡might£»¡¡no¡¡doubt£»¡¡have¡¡gone¡¡to¡¡the¡¡jury¡£¡¡Common¡¡sense¡¡and¡¡common¡¡knowledge¡¡are¡¡as¡¡often¡¡sufficient¡¡to¡¡determine¡¡whether¡¡proper¡¡care¡¡has¡¡been¡¡taken¡¡of¡¡an¡¡animal£»¡¡as¡¡they¡¡are¡¡to¡¡say¡¡whether¡¡A¡¡or¡¡B¡¡owns¡¡it¡£¡¡The¡¡cases¡¡which¡¡first¡¡arose¡¡were¡¡not¡¡of¡¡a¡¡kind¡¡to¡¡suggest¡¡analysis£»¡¡and¡¡negligence¡¡was¡¡used¡¡as¡¡a¡¡proximately¡¡simple¡¡element¡¡for¡¡a¡¡long¡¡time¡¡before¡¡the¡¡need¡¡or¡¡possibility¡¡of¡¡analysis¡¡was¡¡felt¡£¡¡Still£»¡¡when¡¡an¡¡issue¡¡of¡¡this¡¡sort¡¡is¡¡found£»¡¡the¡¡dispute¡¡is¡¡rather¡¡what¡¡the¡¡acts¡¡or¡¡omissions¡¡of¡¡the¡¡defendant¡¡were¡¡than¡¡on¡¡the¡¡standard¡¡of¡¡conduct¡£¡¡/1/¡¡The¡¡£§115£§¡¡distinction¡¡between¡¡the¡¡functions¡¡of¡¡court¡¡and¡¡jury¡¡does¡¡not¡¡come¡¡in¡¡question¡¡until¡¡the¡¡parties¡¡differ¡¡as¡¡to¡¡the¡¡standard¡¡of¡¡conduct¡£¡¡Negligence£»¡¡like¡¡ownership£»¡¡is¡¡a¡¡complex¡¡conception¡£¡¡Just¡¡as¡¡the¡¡latter¡¡imports¡¡the¡¡existence¡¡of¡¡certain¡¡facts£»¡¡and¡¡also¡¡the¡¡consequence¡¡£¨protection¡¡against¡¡all¡¡the¡¡world£©¡¡which¡¡the¡¡law¡¡attaches¡¡to¡¡those¡¡facts£»¡¡the¡¡former¡¡imports¡¡the¡¡existence¡¡of¡¡certain¡¡facts¡¡£¨conduct£©¡¡and¡¡also¡¡the¡¡consequence¡¡£¨liability£©¡¡which¡¡the¡¡law¡¡attaches¡¡to¡¡those¡¡facts¡£¡¡In¡¡most¡¡cases¡¡the¡¡question¡¡is¡¡upon¡¡the¡¡facts£»¡¡and¡¡it¡¡is¡¡only¡¡occasionally¡¡that¡¡one¡¡arises¡¡on¡¡the¡¡consequence¡£
It¡¡will¡¡have¡¡been¡¡noticed¡¡how¡¡the¡¡judges¡¡pass¡¡on¡¡the¡¡defendant's¡¡acts¡¡£¨on¡¡grounds¡¡of¡¡fault¡¡and¡¡public¡¡policy£©¡¡in¡¡the¡¡case¡¡of¡¡the¡¡thorns£»¡¡and¡¡that¡¡in¡¡Weaver¡¡v¡£¡¡Ward¡¡/1/it¡¡is¡¡said¡¡that¡¡the¡¡facts¡¡constituting¡¡an¡¡excuse£»¡¡and¡¡showing¡¡that¡¡the¡¡defendant¡¡was¡¡free¡¡from¡¡negligence£»¡¡should¡¡have¡¡been¡¡spread¡¡upon¡¡the¡¡record£»¡¡in¡¡order¡¡th