Dots can be periodic.Logical formLearned from2 sentences. A (diffraction grating) can be periodic.Logical formLearned from2 sentences. A (spore formation) can be periodic.Logical formLearned from2 sentences. A (diffraction pattern) can be periodic.Logical formLearned from2 sentences. Textures can be consistent with periodic variations.Logical formLearned from2 sentences. (Time requests) can be periodic.Logical formLearned from2 sentences. Responses can be periodic with (period pi).Logical formLearned from2 sentences. (Walking persons) may use periodic variation.Logical formLearned from2 sentences. A scarcity can be periodic.Logical formLearned from2 sentences. (Calibration data) can be periodic.Logical formLearned from2 sentences. An evaporation can be periodic.Logical formLearned from2 sentences. (Gender information sessions) can be periodic.Logical formLearned from2 sentences. Syncs can be periodic.Logical formLearned from2 sentences. (Virus scans) can be periodic.Logical formLearned from2 sentences. (School visits) can be periodic.Logical formLearned from2 sentences.