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I NTRODUCTION
n ft f lf tht w rtnl nnt gnr tht ur mnd wuld b lbl fr vrthng tht th bd d. h mn tht whtvr nflun ur brn n nflun ll th thr t f ur lv. h, th brnwr wuld dnd hvl n th , r th mntlt u hv, nd th thnlg tht wuld b th nrv.
W knw tht dlng n mlx mhn, n ld f n hrdwr, nd thn gttng m r ltn n t, vr dffult. h tull nd u bng lttl f th mutr' nrg-wtng mx f ln nd lumnum. hl brng th thrtl ntrut nt th rrt lght, t mrtnt fr u t tk lk t m f th vru t tht r t th ntr f th thr, nd hw w n utlz thm fr ur gn.
Nxt, w ught t tk k t wht ur "ntrnl mdl" ntl. mdl wll ntll b mrm rfltn f th tul ntt. h ntt m thr b hl r nn-hl, t dn't rll mttr. t' gng t b lk mdl, hmt, ttrn, r glb, bu t' gng t rrnt m f th mn ftur f th tul thng, wthut hvng t rr ll th t tht m wth t.
dlng wht w n fnd n numbr f n nd thnl ndvr. ht d nt ml, thugh, tht w hv t k th mdl lmtd t nl th tw rgn.
hr uld b numbr f vru lutn ut thr tht ldg t fu n hvng tk mlhd mr qukl, nd lnt f mmtmnt tht n m t hl u hndl ur tm nd mr, but th bhvrl mdl m b m f th trngt h ut thr fr u t u.
u n k th n u r ung, bu th mr u thnk but thm, th bttr t t tk n frm ur tlbx t gt t t funtn wll. h n u whl nw unvr but wht u n hv, hw ml t t gt th wrk mltd nd hw u n xl wth whtvr ffrt u h t mk. w mn f th thr lutn ut thr wll b bl t ul u wth wht uh thrtl mdl nnt d?
h dn't mn u n't u n f th rur tht r ut thr nd n t nn wh wnt th bhvrl mdl t b hngd. nd f u'r fud n tuff lk tm ntrl nd h t u m r grh t urt u, r th mdr tmr, thn th tll mltl rrt. ut u n nt tht t n b uful t rt fr th ntul mdl vn wthut ll th thr tl fr th tr.
hr r mn k xlntn wh u wuld wnt t tk lk t dgn nd f t wll funtn wth vrl vru thnl nd n dvntur. mng th mt mrtnt xlntn fr th r:
mdl n llw u t rrnt tur f th mnd, th hl th d f th mdl muh mlr t gr rltv t th mn thm.
h mdl wuld rmt nd mk t r fr nn t vw th tul thng.
mdl wuld b muh hr fr rtng nd utlzng thn th tul rdut. h ml tht th rk f brkng th nt rtvl wuld b mnml, f bl.
mdl mlr t nfrm thn th tul rlt t th hng n th rnl dfntn. h mdl wll b t-fftv trtg fr lmntng n bggr flw. tk, rrr, nd vn mundrtndng n b l dttd w lk t th mdl nd mk rrt rrtn t t bfr th fnl ntt rld.
Whl t bl tht w r bl t lk t m mdl n hl frm, thr r thr tht rfrm bttr whn w lk t thm n vrtul w. Funtnl vrn wuld b fr tm mrng n t uh rrft, vhl, hu, mnufturng, trrtr nd th lk. n th thr d, multd mdl wuld b fr tm tht rn't rl, lk th mtn, rtvt, rtn, nd mnng.
ntl rrnttn wuld ll undr th bv-mntnd btrt xtn n th mnd nt tull tngbl ntt. n f th multd mdl u uld rlvnt t th mght b t lk trtg mltr mdl, mdl f t, mdl f rgnztn, nd mr.
Whr D ntl dl m Frm?
ntl mdl r t f rtn lflng thught ttrn tht l rt. thr r nturl whn th r frm hlgl nd ulturl nt f vw, nludng th blf tht nt fl. n gnrl, l hv n vrn t nt wthut bng dvd t d . thr r rtd frm hldhd. Fr xml, whl rjud wdl blvd t b fl, t' n u vn td bu rl vw r d dwn r ntur nd mn l r nt nu f thr blt t trnnd th tgm, th blv t rlt. h tmhr f n ndvdul fft th knd f mntl mdl gnfntl, whh wh th n dffr frm t t t.
m thrtl ntrut r frm th rtn f rn nd hw th ntrtn hv nflund thr vw f th nvrnmnt. Fr ntn, mn wh h xrnd vrl u bmng unfthful m uh tn n thr nw rtnr nd rlt thm t htng ttrn, rh wthut rf tht thr u ht. n thr trnd bhvrl mdl wrn thm wh thr mt dl dntl hbt, th rt brvtn tht wll dmg th rtnrh.
Lrnng t rgnz th bhvrl mdl tht u u frquntl k t undrtndng hw t vrm nd thnk dl but u. vn thugh bhvrl mdl r k t thnkng nd bhvr, th bdl utd t th hllng t hnd r l lkl t ld fvrbl fft thn th rfull hn. h ftn truggl whn th rtrt th munt f knwldg tht ndrd whn mkng dn r rlvng n u, ll whn mkng nrrt umtn. h rtn r l th rdut f th ntrtn f n ndvdul, nd hw th hv nflund th w th vw th unvr.
CHAPTER 1
What are Models?
A mdl tm btrtn, nd/r mlftn. nl drm but dllhu. t lk lk rl (nl mllr) hu nd h muh f th m lmnt. t m hv kthn ln, vn f th dn't tull wrk. h dllhu mdl f th rl hu nd wll b rgnzd uh b nn fmlr wth hu.
"ll vrn r bll wrng but m r uful."-Grg x
u blurnt jut n d t' nhrntl wrng, u n't turn th dllhu tv n. ut tht n b hlful r gv nght.
- dl mlfd vrn f m t f rlt but whh w wh t lrn mr. mgn dgrm, t' n btrt mlt w f undrtndng hl . h hrt nt qut lk th lnd t dt, but t n tll u hlful fld f dtl tht t .
, wht mk mntl mdl l? h r mdl ntndd fr nvng nd multng wthn nu mnd. ur nl ng t ntd f rtng dllhu, uttng th rm nd furntur whr th ft, ltng ut nt lr nd thr dtl. ntl mdl rl n xtng nfrmtn t rvd rfundt nd n t thm. f u dn't rlz wht rfrgrtr u wuldn't knw t' n th kthn.
W'v ud mntl mdl fr t rrnt vr ml hl bjt ( dllhu) but th n d lt mr. h rl but f lrnng dffrnt mdl tht th hl u t mlf mr mlx tm nd rnl. Lt lk n llutrtn n n f th mt fundmntl nm mdl: ul nd dmnd. n nnt tm, l hd n d hw th mrkt rtd, nd rult, fd hrtg wr frqunt. ntm dttr flt lk mntng mr ng, nfltn uld run rmnt. d w knw mr, nd rult w r njng mr tbl wrld. h nt th rdut f ntllgnt mdrn l, but rthr th umultn f umultv knwldg nd th rtn f mdl bd n vnt tht tk l vr tm. bd nd dmnd n f th mt wll-knwn nd mlt t xln. f l brd vlbl t ll dmnd (nd r) wll g u. f t muh brd vlbl th mrkt wll g dwn. lthugh th mdl mlftn, t ntrutv nd n xln nthng t th wh u t.
rt lbx
"h frt nt tht u hv t hv multl mdl bu f u hv jut n r tw t u, th ntur f humn rnlt uh tht u wll mnult rlt t ft th mdl. nd th mdl mut m frm multl fld bu nt ll f th wrld' xrt n b ntnd n n tn dm drtmnt. " -hrl ungr.
vr mntl mdl u nrrt n ntrumnt n ur tlbx. m tl r grt fr n f ur, m r mmnl ubl. Jut rtnd tht u'r trng t buld whl hm. Fr th llr, ud rqur ltrl qumnt nd lumbng ul, rfng nd rntr tl, wll mtrl fr dlng wth drwll mud nd mrtr. t' qull mrtnt t hv wd t f mntl mdl t h n. f u nl hv t rl n nm mdl u n lk t vrthng n trm f t nd bnft. f u hv nl mmuntn rur, u n rl n th mtnl d f thng but nglt thr rblm. hr thrtl mdl lld lw' mmr tht wrk wll nt th dbt, ; " thnk t' t rh t f t wr nl f th nl wn u hv hmmr."
Advantages of being a generalist
n n r rvdng lrg vrt f xrt bnfl. h dwnd f bng t qulfd tht u m nt nw r nvl rh t dlmm. ll, brkthrugh m frm lng mdl frm n r t mltl unrltd fld. xln th flng but th dvnmnt n rtht fr l wh hv lt lg n th t dd. f tndrd mdl mdl wr th nl w t ddr th rblm th bnft wuld hv bn mr mnml. t rmrkbl dvn hv bn hvd n drwng frm rbt, nurl mdl nd vn gnt. vlbl td r full rtultd rm nd hnd.
l wh l lg r llwd t run mrthn r g nwbrdng. ll th bu rrh u lrgr t f tl nd nrrt dffrnt mdl n unqu w.
dntf th urrnt mdl
h drwbk t mntl mdl th n nflun hw u th unvr. Whh mght jut b dngru. durg r mrgnlz thr wh r dffrnt r u frgn lngug, vrl l hv tblhd n mbddd rdgm. lthugh mt l wll gr tht th rrhnbl, t tll rdgm f mndt. t n b dffult t dntf th xtng mdl but t n l hv muh fft ddng nw rtt t th tlbx.