What is entailment? Entailment is a concept that refers to a specific kind of relationship between two sentences. More specifically, entailment means that if one sentence is true, then another sentence would also have to be true: the second sentence would be entailed by the first sentence. Another way to prove entailment between two sentences is to demonstrate that if the one sentence is false, then the other sentence must also be false. Entailment is closely related to the concept of logical consequence. Within logic, the idea that if A is true, then B must be true too is nothing other than a form of entailment. Usage and rules
The topic is being increasingly debated as children get smartphones at an ever younger age. On average, children are getting their first smartphones around age 10, according to the research firm Influence Central, down from age 12 in 2012. For some children, smartphone ownership starts even sooner â including second graders as young as 7, according to internet safety experts.
While Pew Research from 2015 puts adult smartphone ownership in the U.S. at 72 percent, thereâs some debate about smartphone ownership among children. The average age for a child to get their first smartphone is currently 10.3 years according to the recent Influence Central report, Kids & Tech: The Evolution of Todayâs Digital Natives. âSetting rules as part of a conversation with your child is going to be far less problematic in the long run.â