-Jerry Pournelle and SM Stirling, "The Children's Hour" IN Larry Niven, Ed., Man-Kzin Wars II (London, 1991), pp. 133-306 AT p. 184.
No, if his paternal (or maternal) grandparents' children had grown up in a different planetary system, then they would have had different children and he would not exist. Poul Anderson's Time Patrol series shows that the world would now be populated by different individuals if history had gone differently.
"The Slasher-class armed scout held three crewkzin in its delta-shaped control chamber, the commander forward and the Sensor and Weapons Operators behind..." (p. 184)
So the Slasher sounds like a Terran Imperial Meteor with its commander, fire control officer and engineer-computerman (Rise Of The Terran Empire, p. 478). Authors of military sf write with apparent familiarity about combat vehicles that do not exist yet and that, hopefully, will not have to exist.