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.
Although 46 checks per day is the average, that number varies depending on usersâ age group. Those between the ages of 18 and 24 look at their phones most often, with an average of 74 checks per day. Americans in the 25-34 age bracket look at their devices 50 times per day, and those between 35 and 44 do so 35 times each day.