To explain our reasoning, we will highlight the important parts of the text in red and ignore the rest.

The day before Gerardo returned from a $t w o - w e e k t r i p,$ he wondered if he left his plants inside his apartment or outside on his deck. He knows these facts.
- If his plants are $i n d o o r s,$ he must water them $a t$ $l e a s t$ $o n c e$ $a$ $w e e k$ or they will die.
- $I f$ $h e$ $l e a v e s$ $h i s$ $p l a n t s$ $o u t d o o r s$ $a n d$ $i t$ $r a i n s,$ $t h e n$ $h e$ $d o e s$ $n o t$ $h a v e$ $t o$ $w a t e r$ $t h e m .$ $O t h e r w i s e,$ $h e$ $m u s t$ $w a t e r$ $t h e m$ $a t$ $l e a s t$ $o n c e$ $a$ $w e e k$ $o r$ $t h e y$ $w i l l$ $d i e .$
- $I t$ $h a s$ $n o t$ $r a i n e d$ $i n$ $h i s$ $t o w n$ $f o r$ $t w o$ $w e e k s .$

Since Gerardo has been away for two weeks, and it has not rained for those two weeks, it does not matter if he left them indoors or outdoors. They will be dead, since they did not get any water even if they were outside.

Exercise

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