Products Tagged "Logic"
![[ Thumbnail: Modus Ponendo Ponens T-Shirt ]](https://rlv.zcache.com/modus_ponendo_ponens_t_shirt-radde58f4d23742e196c5bab4adc92204_johyh_152.jpg)
Mathematicians, logicians and computer scientists will be among the people who appreciate the Latin phrase "modus ponendo ponens" that appears in this design.
![[ Thumbnail: Modus Tollendo Tollens T-Shirt ]](https://rlv.zcache.com/modus_tollendo_tollens_t_shirt-rcf41eae35a064664aaa1ebaefb5ee2be_jyr6t_152.jpg)
Mathematicians, logicians and computer scientists will be among the people who appreciate the Latin phrase "modus tollendo tollens" that appears in this design.
![[ Thumbnail: ⇔ If and Only If T-Shirt ]](https://rlv.zcache.com/if_and_only_if_t_shirt-r9ad65d1dfc9649c8aab3a5dd35c6d229_jgsdi_152.jpg)
Those familiar with logic and philosophy may be amused by this design which has the ⇔ symbol and the phrase "If and Only If".