(203) Robert Logan's conflation of the dramatist (Marlowe) with his successor (Shakespeare)? ......or with his pseudonym?

Marlowe and Shakespeares conflation:  

An Abyss of irrationality

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Robert Logan

On the cover picture (middle) of his Book "Shakespeare's Marlowe The Influence of Christopher Marlowe on Shakespeare's Artistry Artistry "  Prof. ->Robert Logan  (Chair of the English Department in the College of Arts and Science, Univ.of Hartford) graphically conflated Shakespeare and Marlowe: 

Obviously he liked this idea  since in his book he reached the conclusion - as the blurb of the book states - 

Shakespeare incorporated into his own work the dramaturgical and literary devices that resulted in Marlowe's artistic and commercial success and absorbed and developed Marlowe's remarkable 

"verbal dexterity", his 

"imaginative flexibility" in reconfiguring standard

                           notions of dramatic genres, and his 

"astute use of ambivalence and ambiguity".

Isn' it an abyss of irrationality to think that ....
....out of two literary giants [Marlowe/Shakespeare, both  borne in  1564, only 2 month apart)  the one [Marlowe], highly educated, successful poet genius, dramatist and theatrical "superstar" in London,  („the predecessor“) ceased to exist (Mai 30, 1593) before the other- unlearned  unknown, unexperienced genius Shakespeare („the successor“) entered on the scene a fortnight after Marlowe's murder, at the top of literary mastership with his first opus "Venus&Adonis".(both never ever  met  (and "handshaked") in London  and did not overlap in their literary activities a single day ..... 


What on earth, Robert Logan  is going on here with the "common sense" of Shakespeare experts?

                   Such a situation dos not seem even theoretically possible!