Another application of non-logical tense connection is to talk about sub-events of events. Consider a six-shooter: a gun which can fire six bullets in succession before reloading. If I fire off the entire magazine twice, I can express the fact in Lojban thus:

**Example 10.159.
**

mi | reroi | pi'u | xaroi | celgau |

I | [twice] | [cross-product] | [six-times] | shoot |

le | seldanti |

the | projectile-launcher. |

On two occasions, I fire the gun six times. |

It would be confusing, though grammatical, to run the
*reroi* and the
*xaroi* directly together. However, the non-logical connective
*pi'u* expresses a Cartesian product (also known as a cross product) of two sets. In this case, there is a set of two firings each of which is represented by a set of six shots, for twelve shots in all (hence the name
“product”: the product of 2 and 6 is 12). Its use specifies very precisely what occurs.

In fact, you can specify strings of interval properties and event contours within a single tense without the use of a logical or non-logical connective cmavo. This allows tenses of the type:

**Example 10.160.
**

la | .djordj. | ca'o | co'a | ciska |

That-named | George | [continuitive] | [initiative] | writes. |

George continues to start to write. |

**Example 10.161.
**

mi | reroi | ca'o | xaroi | darxi | le | damri |

I | [twice] | [continuitive] | [six-times] | hit | the | drum. |

On two occasions, I continue to beat the drum six times. |